The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

The world's largest maze is a nature park with nearly 200 decision points.

A natural wonder in south Denmark.

A walkable map of the world, made from soil and stone by one man.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

A winding, blood-red tunnel of hardened lava navigable by foot.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Rising from the sea like a stone monster.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Nature's slip and slide.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Where manatees are the snowbird vacationers in these balmy Florida springs.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

A haunted hill that supposedly defied gravity.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

One of many gator theme parks, abandoned in the sugar fields of South Florida.