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

Each winter this underground cave forms a dazzling ice palace.

Towering basalt columns, a creation of fire and ice.

A 19th-century cabin built into a hollowed-out Sequoia tree.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Sasqu(w)atch out!

This natural marble cave is one of only five national monuments in Oregon.

This little museum has an exhibit devoted to the elusive forest denizens.

An abandoned Cold War missile radar site.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

Dive bar built out of the remains of a whaling ship.

Visible below the waves are memorials to the city's Gold Rush dead.

Quite simply the largest tree in the world (by volume).

Thousands of fossilized footprints speckle this Bolivian national park.

Prehistoric park filled with the fossils of dozens of extinct species including Australian megafauna.

Fossils, railroads, and waterfalls!

A rare kind of blue bear can be found chiefly in the national park that shares their name.

A meditative space out of a fantasy story.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

A beautiful geyser under environmental threat.

An oil baron's wild paradise and the winner of an ill-fated air race.

This landmark Victorian folly rewards visitors with spectacular views over the Peak District.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.