"A renovated Nazi-era bunker in the now-posh Mitte district houses this private collection of contemporary art, owned by Christian and Karen Boros (who actually live in an apartment on the roof). The selection of sculpture, paintings, photographs, and installations by international artists rotate every four years, but have recently featured contemporary artists like Jean-Marie Appriou, Julian Charrière, Eliza Douglas. A guided tour across its five floors reveals not only the impressive collection but also the long history of the bunker, which was used as a Nazi air raid shelter and later became an underground techno club (you can still see vestiges of fluorescent paint in some rooms and stairwells). Tours (required) book up months in advance, so plan accordingly." - Jennifer Ceaser
