A unique walk through hundreds of cactus plants, including some that stretch over 8 feet tall.

A spectacular impact crater in the rugged heart of Central Australia.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

This Oaxacan town is known for its colorful fantastical creatures hand-carved by local artisans.

Three small rooms in the jungle house the most elaborate and intact murals of the Mayan world.

Iconic red and white plaques show the creative names invented to navigate the city streets.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

At high tide this strange footbridge appears to have no purpose whatsoever.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A spiritual sanctuary in a natural cave.

The world's longest known cave system.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An island graveyard with spectacular views of the Caribbean.

It's said to be one of the most significant collections of contemporary Chinese art in the world.

This piece of Australian modern art is part joke and part history.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Take a drunken tour inside the world's largest known geode.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A subterranean playground in an abandoned slate mine.

A pagan tradition of draping trees with rags eerily lives on.