Teufelsberg
Piled from the rubble of bombed-out Berlin, this artificial hill in the Grunewald forest is topped by a derelict American spy station whose dome-shaped radomes still hum in the wind. Today the shells are coated floor to ceiling in ever-changing street art, and the rooftop platforms open onto one of the widest panoramas of the city. It feels less like a museum than a sanctioned ruin you are free to roam.
Why go: An eerie Cold War listening post turned open-air graffiti gallery with sweeping skyline views.








