Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

Home to items never before seen by the public.

A former major munitions plant that has been converted into a sprawling art space.

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

From scholastic to sepulchral - now under reconstruction.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Death comes to anyone who dares to touch this concrete column.

A huge musical instrument played by the ocean.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

Home with Gothic windows featured in a famous painting.

The Grand Canyon of Texas.

Pay your respects to a folk-punk legend.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Historic funicular railway, believed to be the shortest railroad in the world.

An archive of nearly every day of Buckminster Fuller's life.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.