This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

Space-age monument to an early 20th-century uprising.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

No one knows why ancient labyrinths were built on this tiny northern island.