NS Documentation Centre of the City of Cologne, Cologne

A creepy building that has witnessed many tragedies. It is a pity that a lot of the written explanations are only in german. But I suppose that you can find guided tours in your own language. When I was there there were many students with teachers/speakers, so it seems that the place is very active in this regard. I would not recommend the visit if you are already feeling depressed.

Great museum with an insane amount of information and media. I like the arrangement throughout the different rooms, and the atmosphere, as the original walls, floor, and the entire building structure have been preserved. The basement prison and the bunker are impressive, with plenty of food for thought. The entry ticket is 4.50€, and the lockers (for backpacks and coats) are free of charge. Kudos to the friendly and helpful personnel! Absolutely recommended.