Boros Collection

The Boros Collection occupies a hulking World War II bunker that later served as a nightclub before being converted into private exhibition space, its raw concrete rooms now hung with works from a serious contemporary art collection. Access is strictly by guided tour, booked well in advance, and reviews split along the same fault line as many guided-tour experiences: some find the tour thorough and rewarding, while others find a particular guide's pacing or delivery tedious.

Its high must-see, culture, and trendy scores, alongside a 4.4 rating, point to a destination that's become a genuine fixture of Berlin's contemporary art circuit despite — or because of — its unusual, tightly controlled access. The bunker setting itself is as memorable as the art inside for most visitors.