A small thermal park among the mountains of Southern Italy features a surprising piece of modern art.

The remains of this medieval Roman road and lookout towers dot the rugged coastline of southern Lazio.

Featured in one of the most iconic scenes in cinema history.

These natural stone bridges are the largest on the European continent.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

This medieval settlement was abandoned after a series of landslides. What remained was largely destroyed during a mock battle for a WWII film reel.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

An abandoned swimming pool decays on the outskirts of Berlin.

This scenic waterfront swimming pool is the longest salt water pool in North America.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.

These 5,000-year-old cave paintings provide a glimpse into prehistoric Finnish life.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

After a traumatic encounter with a six-foot eel, one Galway baker started making a daily loaf of sourdough in its shape.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

This French Canadian classic is a specialty of the oldest continually used church in Minneapolis.

The pharmacy's retro ice cream mixer is one of the last of its kind.

A public urinal so pretty, it was declared a national monument.

Norway has built what may be the world's most beautiful public toilet.

A network of ancient Egyptian tombs built into the cliff face along the Nile.