A bizarre house filled with an astounding array of collections.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

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.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Dramatic river bend surrounds a natural red-rocked pedestal.

The world's only museum devoted to the wonders of fluorescence.

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

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

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

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A kaleidoscopic warehouse-maze of handmade neon signs.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

A mysterious taxidermy man-beast of the seven seas.

Fossils, railroads, and waterfalls!

These little-known sands dunes are a geological anomaly in Saskatchewan's southern prairies.

An outcropping plays host to the largest collection of pre-contact petroglyphs in Saskatchewan.