An 800-year-old island castle in Guernsey's main harbor.

An intricately decorated tiny place of worship.

One of the world's smallest prisons boasts just two small cells.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

The highest cold-water geyser in the world.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Germany's longest suspension rope bridge.

Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

An abstract sculpture that will be a work in progress for the next 1,000 years.

A meteorite-bounded town in Bavaria.