This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

Rare recess caves fill this unbelievably beautiful Ohio park.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

Five acres of divinely inspired folk art.

Robots, lasers, and whoopee cushions, oh my!

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A bizarre house filled with an astounding array of collections.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The largest self-built castle in the U.S., six decades in the making.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.

This preserved village shows the modest lifestyles of the area's 19th-century Chinese gold miners.

One of the largest collections of traditional Māori artifacts in New Zealand.