A history of heat is on display at this unique Austrian museum.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Apartment complexes built into huge repurposed natural gas tanks.

Museum devoted to the artificial language of Esperanto.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This splendid tomb may look fantastic, but there's nothing in it...

1513 Turkish world map, full of European state secrets and snarky commentary.

Antique cinematography artifacts fill this museum dedicated to the inventors of the moving picture.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Stone slabs along the coast warn of Japan's tsunami-ravaged past, often marking the highest point of a wave's reach.

A three-tiered waterfall plummets from a mountain cave with amazing views over the countryside.