A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

Seth Bullock, the sheriff of Deadwood, built this town immediately after Teddy Roosevelt’s death in 1919.

A small Wyoming town is home to the state's oldest-operating soda fountain.

Take a dip in the world's largest mineral hot springs pool.

A house carved into a rock in the 1940s.

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

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

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

The location where the iconic movie character declared it was time to go home.

More than a century old, this trading post resides in the Navajo Nation.

Famously misunderstood wonder of the ancient world

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

The first declared National Monument in the United States.

Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

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

Megachurch turned Catholic church comprised of 10,000 glass panes.

The haunting ruins of Jack London's dream house.

A giant donut stands as a popular symbol of Los Angeles iconography.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

San Diego's most historic and haunted home.