The illuminated falls are a gem in North Cascades National Park.

The northernmost truck stop in the United States.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

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

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

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

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

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

The fifth-longest natural arch in the world, and the longest outside China.

The remains of an early 1900s dude ranch that operated until the 1970s.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

No Gordon Lightfoot song, only a barebones monument to greed.

Four hundred granite steps were built into this massive rock by the National Park Service.

The unusual patterns in this rock formation result from two distinct modes of weathering.

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.

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

Rippling sand dunes frozen in the Arizona rock.

A psychedelic labyrinth on the San Francisco bay.

Where the polar bear watches over everything, and every drink is a double.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.