This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Towering basalt columns, a creation of fire and ice.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A trash dump made beautiful by nature's power.

Mysterious rocks that ring musically when struck.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Home of an evil witch famous within southern folklore.

A toxic ghost town sitting atop a massive coal fire.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Try not to get slimed in Tribeca.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Rippling sand dunes frozen in the Arizona rock.