In 1940, Hitler ordered the construction of six anti-aircraft, or “Flak” towers to defend Berlin from enemy aircraft. Of these six, only three were built, and after the war they were “demilitarized” – or blown up, however the Flak tower in Humboldthain park in Gesundbrunnen was only partially destroyed.
Since April 2004 we have been leading groups through the interior of the tower. On this fascinating tour, visitors will be shown two of the seven floors of one of the biggest bunkers in the city. Here a dazzling underground landscape awaits – complete with dizzying views into the depths of the building. In addition, our guides present in-depth information about the history of the structure and the still on-going project to clean it up. To date, members of the Berlin Underworlds Association have spent a total of over 8,000 hours removing over 1,400 cubic metres of rubble – and have created in the process ideal sleeping quarters for bats. Therefore, so as not to disturb their hibernation and unnecessarily frighten our guests, we only offer this tour from April to the end of October.
For more detailed information about the Flak Tower, please take a look at Flakturm Humboldthain (in German language only).
All participants must be at least 18 years of age.
Sturdy footwear is obligatory (no sandals or flip-flops!) and warm clothing is recommended – the interior temperature is never more than 10°C, even in summer. Safety helmets, provided by the association, have to be worn throughout the duration of the tour.
April 1st to October 31st:
Please use the calendar function on the left hand side of the page to display which tours are taking place.
The times for tours in other languages can be seen by visiting their respective pages, or via the calendar function.
Approx. 90 mins
10 € (reduced 8 €)
Tickets are available from 10.00 a.m. (open from 9:00 a.m. on Saturdays, Sundays and Holidays from April through the end of October) in the pavilion next to the south entrance of the Gesundbrunnen underground station (in front of ‘Kaufland’), Brunnenstraße 105, 13355 Berlin (exit direction to Humboldthain Park, Brunnenstraße).
Reservations are not possible and tickets may only be purchased on the day of the tour.
Please arrive early in order to buy them – expect lines on busy days.
We only take cash as payment, credit/bank cards are not accepted!
Brunnenstr. 105 – southern entrance-hall of the subway station Gesundbrunnen (exit direction to Humboldthain Park, Brunnenstraße), next to our ticket sales-pavillon.
U8 Underground Railway Gesundbrunnen, S 1, S 2, 25, S 41, S 42 (S-Bahn, City-Railway, National Railway) Gesundbrunnen, Bus 247
This tour is also available upon request to groups in English and in some other languages (min. 200,- € / reduced 160,- € per group). Please contact us for details.