Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

The largest drain hole in the world.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

In this beloved beach town, a secret seafood haven lies tucked behind a car wash.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The oldest church in Iceland is one of the few to feature ornate decoration.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

The fading, forgotten remains of a once bright and booming factory.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

The site of the first battle of World War II.

This former steel and coal plant is now a neon-lit industrial fantasia.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

One family's environment-friendly hobbit-house in Wales.

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

The world’s largest work of glass art hides in this stunning Taiwanese subway station.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.