Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A 30-acre garden inspired by the principles of modern physics.

400-year-old garden, restored to beauty.

Once the home of a hermetic monk, this cave now houses a small church.

An ancient city exhumed from the depths of the ocean.

Malaysian fireflies create a dazzling display as thousands light up in unison.

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

This former insane asylum now holds a pathological anatomy museum.

Fire meets ice at the southernmost volcano on Earth.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Houses are tucked between, on, and underneath giant boulders.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

This massive underground salt mine now holds a sci-fi theme park in its depths.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

White beach sands made of the remains of tiny, star shaped creatures.

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

Moss and stone turn this waterfall into an otherworldly liquid veil.