Catacombs turned marketplace.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

The rocky remains of an ancient Greek forest.

This expansive bridge in the Canadian wilderness was originally just built for friends.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This quirky piece of naval artillery has been deafening Canadians for over a century.