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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This geothermal hot spring hides beneath a slowly growing mineral dome.

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.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The "Seinfeld" diner.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

A chance to sleep among the firs and pines of the Oregon forest.

This medieval village/restaurant perpetually celebrates the year 1376.

A whimsical village of unique treehouses resides in a Washington forest.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

A German town is growing a building out of trees.

Home to the "Circus" trees created by Axel Erlandson.

A 100-year-old chair with joints "cemented by nature."

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

The hill that gave the Massachusett tribe, and later the state, its name.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

This legendary urban waterfall creates a dazzling display of rainbows.