This building holds the embalmed remains of the leader of the Bolshevik Revolution.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

It houses the remains of a 17th-century version of the Titanic.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A monument celebrating the idea of reaching inaccessible places.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The largest greenhouse in the world is home to over one million types of plants.

The world's most active stratovolcano is almost always erupting.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

This chimerical bridge/tunnel appears to dead end right into the sea.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

Swedish skyscraper with a 90° twist.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.