A miniature rainforest is growing inside of a Midtown Manhattan office building.

The world's longest known cave system.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

The Magical World of George Phar Legler.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Extraordinary sculpture garden created by an eccentric English poet.

A limestone wonderland of water and subterranean secrets.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

Odd outsider art installations surround a Gold Rush-era ghost town.

The remains of diamond fever taken over by the desert.