The largest drain hole in the world.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A hotel and restaurant serving as the mecca of kitsch.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

San Francisco's newly reopened hands-on science museum.

Back in the day everyone who was anyone played this historic western theater.

The farthest you can be in the contiguous U.S. from a McDonald's location.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Frank Lloyd Wright died a year before construction on his largest public project even began.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

Concrete strongholds stand guard over the Golden Gate.

A dentist's hated concrete colossi are now beloved icons of the community.

These unusual houses look like giant boats that washed ashore on a residential street.

Oakland's beautiful monumental cemetery.

Where the polar bear watches over everything, and every drink is a double.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

This museum looks at the history of one of America's most famous prisons and most beloved albums.

This abandoned boat was left in place thanks to its rotting beauty.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

A vast city of the dead, where the deceased outnumber the living by more than a million.

A tribute to the life and work of the beloved "Peanuts" cartoonist.