The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

This black shoreline is made up of exploded lava particles.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The private clubhouse for the members of the Academy of Magical Arts.

Resting place of Hollywood's immortals is also site of summer film screenings.

The legendary building that needed ghostly approval before being built.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Famous and forgotten figures lie beneath the faded headstones and decaying planks of wood.

Sports history, made in the Arroyo Seco.

At 130 years old and 126 feet tall, it is the largest known example of the rare Torrey pine tree.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

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

An Old West film set seen in countless TV shows and movies is open for the public to explore.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

This giant temperature attraction created some giant electric bills.

North America's largest accredited model railroad museum.

A giant chess set, minus the psychedelic drug trip.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

Rare collectibles from automated musical instruments to 250 unique automobiles.

Oldest building in California still in use.

The show's fictional Korean medical camp was created in the Santa Monica hills.