This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

A striking 12th-century-style castle built on the edge of a cliff.

The narrowest street in the world is in danger of closing up entirely.

The old castle kitchen where nucleic acid was first isolated is considered the "cradle of biochemistry."

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

This natural hill rose another 130 feet from the debris and rubble added after World War II.