The only castle in North America to ever house European sovereigns.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

The final resting place of the living embodiment of the famous Forest Service symbol.

This is one really big nut.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

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

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A monument to the love people have for their pets.

In the middle of a remote desert town is a surprisingly opulent hotel.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

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