Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

A private collection of massive steel monsters guarding a Texas pipe works.

Visit the monolithic tomb of America's most famous general.

The famous author's cottage hideaway.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

This quiet park's strange sedimentary spires were named after Kodak's color film.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

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

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

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

The Grand Canyon of Texas.

A Prada store in the West Texas desert that is never open for business.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.