These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.

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

World's first "penitentiary," meant to be humane, drove men insane.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Rippling sand dunes frozen in the Arizona rock.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

The magical, mossy forest that inspired 'Princess Mononoke.'

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

A taste of the macabre Tokyo's ritzy shopping district.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

270 million year-old forest of stone.

These layered sandstone mountains in China look like they are made of pressed crayons.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A part of the world's largest marsh seems to be growing bright red Martian grass.