Berlin is a city that lives in the present tense — but it can't escape its past, and it doesn't try to. The Brandenburg Gate, the remnants of the Wall (the East Side Gallery runs 1.3 km along the Spree), the Holocaust Memorial, Checkpoint Charlie, the Reichstag with its glass dome open to the public: the 20th century is embedded in the city's fabric at every turn. What's remarkable is that this history doesn't weigh the city down. Berlin is restless, creative, and genuinely alive in a way that most European capitals have long since traded away for comfort.
The city divides neatly into its old eastern and western halves, though the line is increasingly hard to trace. Berlin Mitte — the historic centre — is where the museums, government buildings, and tourist crowds concentrate. Museum Island alone, with the Pergamon and the Bode, could absorb a full day. But the neighbourhoods are where Berlin really happens: Kreuzberg for its mix of Turkish food, punk bars, and new-money restaurants; Prenzlauer Berg for its cafes and Sunday Mauerpark flea market; Friedrichshain for its techno clubs and East Side Gallery. Charlottenburg holds the Ku'damm shopping boulevard, the Bröhan Museum, and Schloss Charlottenburg. Schöneberg is easy-going and stylish. Each district has a distinct character; it's worth picking two or three and slowing down in them rather than trying to sprint across the whole city.
The food and nightlife scene is vast and deliberately hard to navigate. Berlin's restaurant culture is international — Turkish döner and Vietnamese bun are as native to the city as Currywurst. Nightlife here is not a Saturday night phenomenon; it's a way of life, and the best clubs don't get going until 2am. Berliners eat late, drink long, and are suspicious of anything that closes before dawn.
Practically: buy a 7-day transport pass when you arrive and use the U-Bahn and S-Bahn freely. The city is also extremely bikeable. Berlin rewards wandering — the most interesting things are often found by accident, down a courtyard (Hof) or up a staircase in a building that looks abandoned from the street.