Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

A decommissioned submarine base makes a great space for graffiti art.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

These rat eating Giant Malaysian Pitcher Plants may have evolved to eat shrew poop.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Monasteries on rock pillars, once accessible only by frayed ropes.

One of the largest caves in the world open to the public.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Museum dedicated to awful artwork.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

When you get to Magnetic Hill park near the sign, put your vehicle in neutral gear, and watch it roll uphill...

Treehouse motel and treehouse-building school.

The most alien-looking place on Earth.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

A museum dedicated to the alleged Roswell Incident.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A spectacular cave and a beguiling lake.

A fiery crater has been burning in the Karakum Desert since 1971.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.