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

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

This unusual rock formation looks like an apple that has been neatly sliced in half.

One of the world's steepest streets seems to have houses sliding down it.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

Some of the clearest water anywhere in the world.

A glacier pocked with ice caves and surrounded by rainforests.

Known for the tunnel that leads visitors to the water.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A perfect turquoise lake colored with glacier dust.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

The hallucinogenic center of the ancient world.

This pair of Australian "waterfalls" appear to be falling straight across the land.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

Australia's largest traditional hedge maze features a Great Gnome Hunt.

The only pollutant in the clear blue water is sunscreen.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

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

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Locals transformed this Canadian evergreen into a secret hangout with spectacular views of Vancouver's skyline.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.