This World War II bunker is now a shrine covered with sea shells.

The grave of the legendary "Bonzo" can often be seen covered in cymbals and drumsticks.

An ancient woodland that inspired a young J.R.R. Tolkien.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

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

Four hundred granite steps were built into this massive rock by the National Park Service.

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

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

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

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

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

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

This building contains handprints that are well over a century old.

The secret city built by the Manhattan Project.

The first integrated firehouse in Atlanta houses a museum on the history of desegregation in the city's fire department.

Georgia's highest point was given its strange name thanks to a simple translation error.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A much-maligned monument to teetotalism.

"A hideous albatross in the Hudson River Valley."

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

Genesis of modern hydroelectric power.

Toxic waste disaster that founded the Superfund program.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.