The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Floating swimming pool within a moored vessel.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Cold war icon and onetime "hole" in the iron curtain.

The most visited, and possibly most controversial, museum in Germany.

This community on a small Venetian island has taken to painting their houses in bright neon hues.