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Value: What Berlin is really like

The History of the Berlin U-Bahn

Why it’s more than just transport – and what it really reveals about Berlin

The Berlin U-Bahn is more than just a transport system. It shows you the city from below – raw, direct, and shaped by over 100 years of history.

Why is the Berlin U-Bahn more than just transportation?

The Berlin U-Bahn opened in 1902 and is one of the oldest underground systems in the world. It was built during a time of rapid urban growth and has since become a reflection of the city’s history. From early elevated tracks to ghost stations during the Cold War and the modern network today, it reveals how Berlin has changed – socially, politically, and culturally.

Foto der gelben berliner U-Bahn der Linie U1

Alright, friends,

the history of the Berlin U-Bahn officially begins in 1902 – but in reality, it starts much earlier. And it tells you more about this city than any travel guide ever could.

Between the age of 6 and 30, I was basically constantly using public transport.

A lot of S-Bahn.
But also the U-Bahn.
And that’s no coincidence.

In Berlin, you don’t need a driver’s license.
Many people don’t even have one.
Or they get it later, sometime in their late 20s.
Not because they can’t.
But because they never needed to.

My childhood lines were:
→ U1
→ S5
→ U5

I grew up around Warschauer Straße.

Which means, in practical terms:

  • S-Bahn from Warschauer Straße
  • U1 right there
  • or U5 from Frankfurter Tor

And if you grow up like that, at some point you understand:

The U-Bahn isn’t just transport.
It is Berlin.

Discover real Berlin →
Foto eines Berliner U-Bahn Ausgangs von der U1 und U9 mit Blick auf die Gedächtniskirche.

The beginnings of the Berlin U-Bahn: Why the city needed a new transport system

At the end of the 19th century, Berlin was going through something very similar to what’s happening again today:

→ The city was growing faster than its infrastructure.

Back then, Berlin wasn’t a single unified city. It was made up of several independent towns:

  • Charlottenburg
  • Schöneberg
  • Wilmersdorf

Distances got longer.

People moved more.
And the transport options?
Horse-drawn trams → too slow
Streetcars → overcrowded
Stadtbahn (from 1882) → first real step forward

But it wasn’t enough.

The idea of an electric railway came early – mainly driven by
→ Werner von Siemens

As early as 1880, he was already thinking about an elevated railway.

The problem:
Berlin was afraid of itself.

  • Afraid of collapses (sandy ground)
  • Afraid of damaging the sewer system
  • Afraid of dark streets caused by elevated tracks

Berlin wanted to grow.
But without taking risks.

Foto in schwarz weiss von einer Bahnbrücke in Berlin.

The turning point: A prediction that changed everything

Building the U-Bahn wasn’t a given.

It was a risk.
And this is where the most important figure in Berlin’s transport history comes in:

→ Gustav Kemmann

He was given a task by Deutsche Bank that had never really existed before:

→ Calculate whether the U-Bahn would even be worth it

No computers.
No models.
No databases.

So what did he do?

He went outside.
He observed.
He counted.

And here’s the part no classic travel guide will ever tell you:

His wife rode the trams across Berlin
and counted people at every stop:

  • who got on
  • who got off
  • how full the cars were

For days. For weeks.
This wasn’t theory.
This was manual work.

From this data, something completely new emerged at the time:

→ a traffic forecast

His result:
→ 22.5 million passengers in the first year

Reality in 1903:
→ 22,664,000
Almost exact.

Even today, modern models rarely achieve that level of precision.

A contemporary later called it:
→ “the secret of transport mathematics”

And that one number made the decision:
→ The U-Bahn would be built

Foto vom leeren Bahnhof Potsdamer Platz.

1902: The moment Berlin changed

The history of the Berlin U-Bahn officially begins in 1902 – with a line no one knew would actually work.

  • Construction started: 1896 (Gitschiner Straße)
  • First official ride (ministerial): February 15, 1902
  • Opening: February 18, 1902

The first route:

  • Stralauer Tor
  • Potsdamer Platz
  • Zoologischer Garten

Suddenly, Berlin became:
→ one of the first subway cities in the world

And right from the beginning, a very typical Berlin detail shows up:
Charlottenburg said:

→ “If it runs here, it runs underground.”
That’s why early tunnel construction started there.

And that proved one crucial thing:
→ A subway beneath Berlin works

Alter Bahnhof in schwarz-weiß in Berlin.

Early expansion: Fast, ambitious – and not always well planned

Between 1900 and 1913, a lot happened in a very short time:

  • 1906 → Charlottenburg (Richard-Wagner-Platz)
  • 1908 → Spittelmarkt
  • 1910 → Schöneberg subway (today’s U4)
  • 1913 → Alexanderplatz, Schönhauser Allee, Dahlem

A total of 35 kilometers of track were built.

But:
Everything was still owned by private companies.
Berlin was growing – but not in a coordinated way.

If you’re interested in how architecture and infrastructure in Berlin have also been used politically, take a look at our blog about the Olympiastadion Berlin – a place where history is still visible today.

Most people experience Berlin the same way.
Sightseeing, long distances, endless Googling.
And in the end: they’ve seen a lot, but understood very little.

Berlin works differently.
The city doesn’t reveal itself through hotspots –
but through places you actually need to know.

I’m from Berlin and have been working in the hospitality industry for years, seeing every day how visitors experience the city – and often misjudge it.

That’s exactly why I’ve collected 500+ real places in Berlin.
No tourist traps. No generic lists.
Just places that actually work –
directly in your Google Maps, ready to use.

Explore 500+ places →
Foto von einer einfahrenden Bahn in den Bahnhof Westhafen.

1920s: Greater Berlin – and the system becomes serious

In 1920, Greater Berlin was formed.

Suddenly, transport had to actually work.

It was no longer about prestige.
It was about moving large numbers of people.

Technically, this led to a major shift:
→ large-profile trains

  • wider
  • more capacity
  • more efficient

A temporary solution was needed:
→ “flower boards” attached to older trains to close the gap

Improvisation, Berlin-style.
Then in 1929, the next major step followed:
→ Berliner Verkehrs-Aktiengesellschaft

Transport services were consolidated.
The U-Bahn became a public, city-run system.

Foto vom leeren Bahnhof in Berlin mit Rolltreppen im Hintergrund.

War: The underground becomes a space for survival

During World War II, the U-Bahn became something else entirely:

  • air-raid shelter
  • place of refuge
  • and later, even a battlefield

In 1945:
→ tunnels were flooded (likely by the SS)
→ one third of the network failed

In the final days of the war:
→ fighting took place inside the tunnels themselves

This was no longer a transport system.
This was war beneath the city.

Bahnhof Bundestag mit Berliner U-Bahn.

1945–1961: Reconstruction – and then the break

What’s almost hard to believe:
By the end of 1945, the first trains were already running again.

By 1952, most of the damage had been repaired.

Then came the turning point:
→ the construction of the Berlin Wall

And suddenly, something happened that could only happen in Berlin:

Lines kept running
but stopped no longer

→ ghost stations

  • dark
  • guarded
  • empty

The U-Bahn was moving through a city that no longer belonged together.

These closed, silent stations almost felt like lost places in the middle of the city – places that existed, but weren’t used for a long time. If you’re interested in exactly these kinds of places, check out our Lost Places Berlin blog.

Foto vom ehemaligen Bahnhof "Messe Berlin" mit Graffiti im Hintergrund.

West Berlin: Expansion despite isolation

While the city was divided:

U6 → extended to Tegel
U7 → massively expanded
U9 → completely new line

West Berlin kept building.

Not out of comfort.
But out of necessity.

gelbe Berliner U-Bahn im Bahnhof Alexanderplatz.

1989–1995: The city comes back together

After the fall of the Berlin Wall:

  • ghost stations reopened
  • lines were reconnected
  • networks grew back together

In 1995:

→ the U1 was running again all the way to Warschauer Straße
For many Berliners, this was more than just a line.

It was a piece of normal life returning.

Bahnbrücke in Berlin-Friedrichshain mit fahrender U-Bahn.

The lines today (U1–U9)

U1: Warschauer Straße ↔ Uhlandstraße
U2: Pankow ↔ Ruhleben
U3: Krumme Lanke ↔ Warschauer Straße
U4: Nollendorfplatz ↔ Innsbrucker Platz
U5: Hönow ↔ Hauptbahnhof
U6: Alt-Tegel ↔ Alt-Mariendorf
U7: Spandau ↔ Rudow
U8: Wittenau ↔ Hermannstraße
U9: Osloer Straße ↔ Rathaus Steglitz

You’ll find the most beautiful stations and their stories, of course, in our guide.

Foto der Berliner U-Bahn voller Graffiti.

The 2000s: The real Berlin underground

You probably can’t imagine this today.

But back then, riding the U1 was a physical risk.
And I mean that seriously.

I’ve seen everything there:

  • people smoking and getting high in the train every day
  • graffiti actions during the ride
  • fights
  • loud music blasting from speakers
  • people injecting
  • heating spoons
  • knife attacks
  • seats being cut open
  • emergency brakes pulled for fun

One specific moment that comes to mind:

Emergency brake.
Two entire carriages spray-painted from the outside.
Then a fight between graffiti writers and security.
Everyone had to get out.
Tracks blocked.

That wasn’t an exception.
That was normal.

If you took the U1 alone at night in the 2000s,
you earned respect in Berlin just by doing that.

This raw, uncontrolled energy wasn’t random – it shaped the entire city. If you want to understand what that time looked like above ground, read our blog about Kunsthaus Tacheles, one of the wildest places of the post-reunification era.

berliner U-Bahn auf Bahnbrücke in Berlin.

Today: Safer – but also smoother

Today, the U-Bahn is:

  • safer
  • cleaner
  • more controlled

But also:
→ less raw

The worst rides might still happen at night on the U8.
But that’s about it.

Sometimes I think:

Every new Berliner should experience the old Berlin at least once.
Just for a day.

So you understand that this city was never meant to be “nice.”

Stehende U-Bahn im Bahnhof Warschauer Strasse.

Facts & figures about the Berlin U-Bahn today

When you look at the Berlin U-Bahn today, you start to understand how large this system has become:

  • total length: around 143 kilometers
  • stations: about 170
  • lines: 9 (U1–U9)
  • daily passengers: over 1 million

Some lines even run 24 hours on weekends – something you won’t find in many other cities.

Especially compared to other European cities, one thing becomes clear:

Berlin doesn’t have a perfect system.
But it has an extremely efficient and densely connected one.

Berliner Bahnhof mit Grünen Säulen und Sitzplätzen mittig.

Conclusion: The U-Bahn is not just transport – it’s a document of time

The history of the Berlin U-Bahn is more than just the development of a transport system.
It shows you:

  • how this city was built
  • how it has changed
  • what it has lost
  • and what has remained

You see:

  • East and West
  • chaos and order
  • past and present

And that’s exactly why:
If you want to understand Berlin,
don’t start above ground. Ride below.

Berlin is not a tourist attraction. Berlin is a city.

See you in the real Berlin – or here in the next blog.

Take care 🖤

Unlock 500+ places now →

Sources: Book "Berliner U-Bahn" by Jürgen Meyer-Kronthaler and Klaus Kurpjuweit | Book "Die schönsten berliner U-Bahnhöfe" by Christian Simon | Book "Berliner u-bahn-Linien" by Alexander Seefeldt and Robert Schwandl | Most images in this article are sample images and were not taken at the places featured.

Frequently Asked Questions about the Berlin U-Bahn

When was the Berlin U-Bahn built and why?

The Berlin U-Bahn officially opened in 1902, but the idea dates back to the late 19th century. At that time, Berlin was growing rapidly, and existing transport systems like horse-drawn trams and streetcars could no longer handle the demand.

The U-Bahn was built to solve this problem and became one of the first underground railway systems in the world.

What are ghost stations in the Berlin U-Bahn?

Ghost stations were underground stations in East Berlin that West Berlin trains passed through without stopping during the Cold War.

These stations were closed, heavily guarded, and left in the dark. They became a symbol of the divided city and were reopened after the fall of the Berlin Wall.

Is the Berlin U-Bahn safe today?

Yes, the Berlin U-Bahn is considered safe today. Compared to the 1990s and early 2000s, it is much cleaner, more controlled, and better monitored.

While there can still be uncomfortable situations, especially at night on certain lines like the U8, the system overall is reliable and safe for daily use.

Why is the Berlin U-Bahn more than just a transport system?

The Berlin U-Bahn reflects the city’s history, division, and transformation.

From its early construction and rapid expansion to its role during World War II and the Cold War, it has always been closely tied to Berlin’s identity. Understanding the U-Bahn helps you understand Berlin itself.

Check out our blogs on insider tips for Berlin.

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