Only known mainland rookery of the threatened Stellar sea lion.

One of Los Angeles's first murals once vibrantly depicted the dangers of United States imperialism.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Legend says train robbers stashed their gold within the depths of this unusual cave.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

This gravity-defying rock formation is one of Big Bend’s natural wonders.

This balancing rock is one of Utah's most unusual geological formations.

Standing 191 feet tall and measuring more than 55 feet in circumference, this is the world's tallest spruce tree.

Odd outsider art installations surround a Gold Rush-era ghost town.

This former open-pit manganese mine is now a massive graffiti canvas.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

The state bird of New Mexico, constructed entirely out of garbage.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

After James Madison's death, his wife and former First Lady Dolley Madison lived in this yellow building near the White House.

The only female equestrian statue in Washington, D.C. is a 15th-century French heroine.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

Some of the Old West's most notorious outlaws frequented this mining town.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

Created by a local artist, these quirky sculptures each have their own names and personalities.

A prison-like structure guards the remains of a notorious Old West outlaw.