Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

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

The neighborhood of Eagle Rock is named after a gigantic boulder with a shadowy surprise.

Sports history, made in the Arroyo Seco.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A 19th-century cabin built into a hollowed-out Sequoia tree.

Each winter this underground cave forms a dazzling ice palace.

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

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall, but rather lightning.

This historic tower in the California desert promises visitors a "vortex of good vibes".

The blinking light atop the iconic landmark has been sending secret messages for decades.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Along a California highway is a kind of Jurassic Park made of metal.

A fake town founded by Western movie stars is now becoming a hip desert community.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Quite simply the largest tree in the world (by volume).

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

The longest and widest floating bridge in the world.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

An extraordinary mixture of natural beauty and man-made phenomena.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.