An ancient impact crater on the outskirts of Pretoria.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Hike amid the palm trees that thrive among Southern California's Indio Hills.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The remains of an early 1900s dude ranch that operated until the 1970s.

A breathtaking flower tunnel bursts with beautiful golden blossoms.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

This riverfront statue honors the inventor of the first video games ever sold.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

The world's largest rotating world.

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

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

An emerald-green grotto just a short trip from Austin.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

Take a sea tractor to the Art Deco hotel on the island that inspired Agatha Christie.

Crooked windswept pines give this old forest an enchanted and magical look.

The castle still holds traces of the abandoned Roman fort it was built atop.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

An enormous dragon scales the walls of this 17-story temple.