Hidden deep in a forest is this geological wonder carved by glaciers.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

England's most notorious suicide spot.

Rocky Atlantic beach home to a stunning stone arch.

In this desolate valley resides a gorgeous set of rocks sporting a technicolor design.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

This restaurant gives a new meaning to farm-to-table cuisine.

A centuries-old iron mine is now a paradise for explorers, divers, and spelunkers.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

These natural cliffs look like they are a part of an old castle complex.

Every summer West Seattle experiences a housing bloom.

The ridged layers that make up this river canyon represent Earth's geological history.

This clifftop arch is a natural stunner.

This 13th century Gothic brick castle is the largest in the world by surface area.

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

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

This eclectic architectural gem played witness to Zurich’s colonial past.

A place to see how French aristocrats lived in the early 1900s.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

The century-old plant starred as the villainous clown's lair in the miniseries based on Stephen King's "It."