Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Limestone caves with spectacular showcase chambers.

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

The glacier tucked within a New Zealand rainforest.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A glacier pocked with ice caves and surrounded by rainforests.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

These spooky and unusual stone formations create an underworldly landscape.

An old slaughterhouse now holds the largest collection of pig artifacts.

"The most colorful grottoes of the world.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Rising from the sea like a stone monster.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The drama of nature in full effect in this Nevada State Park.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Eons old volcanic activity created one of the most stunning rock formations in the United States.