A tunnel of hardened lava along Maui’s famous Road to Hana.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The mummified relic of St. Antoninus.

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

100 year tradition of fist fights, marked by marble footsteps.

The bomb-ravaged remains of of a colossal Neptune.

Mysterious tombstones thought to be remnants of Atlantis.

A small but immensely extravagant palace built by the "Night King."

Europe’s oldest natural human mummy.

The fairy tale castle of the "fairy-tale king."

Visitors dip into a variety of pools of what was once ice.

A wall of chewing gum moonlights as collective art.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Single runway interrupted by a busy road that cuts across its middle.

A marvel of Byzantine engineering under the streets of Istanbul.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

World's largest barrel containing an inn.