Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Berlin's old airport.

An old department store turned Nazi prison turned artist commune.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This attraction was abandoned after the Chernobyl disaster.

This derelict superstructure was a very important warning system for the Soviet military.

The deepest metro station in the world.