Berliner Unterwelten shows a side of Berlin most visitors never see. We especially recommend Tour M, which covers escape tunnels under the Wall, abandoned stations and the Stasi. Students also see a replica of Tunnel 57, which they cross in our “Spy & Escape” scavenger hunt. The guide answers questions at the end. The tour takes about two hours and ends at the Berlin Wall Memorial.

This bike tour starts in Prenzlauer Berg and covers Berlin's main sights, including Museum Island, the Brandenburg Gate, the Reichstag and the government district. Guides share stories and local tips along the way. It's a great way to get to know the city on the first day of the trip. Tours take 1 to 3 hours.

On this guided street art tour, students discover murals, paste-ups and graffiti in some of Berlin's most creative neighbourhoods. The guide explains who made them and what they say about the city, its politics and its history. Tours start at Hackescher Markt, run on weekends and take 2 to 3 hours.

The Memorial to the Murdered Jews of Europe is a field of 2,711 concrete blocks near the Brandenburg Gate. School classes usually walk through the field first and then visit the information centre underneath, which tells the stories of individual victims and families. It's a moving experience that needs some preparation. A visit takes about two hours.

The German Spy Museum at Potsdamer Platz covers espionage from ancient times to the Cold War and today. Students can crack codes, try the laser maze and learn how intelligence services work. A section on data and social media gets them thinking about their own privacy. A visit takes about 1.5 hours.