These hooded graves are the only of their kind in the United States.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

Metal monsters made from repurposed materials lurk alongside this Pennsylvania road.

Mysterious rocks that ring musically when struck.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

No one knows how or why this painting appeared to produce crystallized tears.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

A "house to which to flee" for settlers in colonial Pennsylvania.

A fascinating community art piece created by students, teachers, and noted Philadelphia artist Isaiah Zagar.

A smaller model of the Da Vinci sculpture that took 500 years to come to life.

An Irish Memorial commemorating those who perished due to potato blight.

A daily replay of the experiment that proved the rotation of the Earth.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

The oldest lawn bowling club in the United States.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

San Francisco's first World's Fair, dedicated to the wonders of California.

A century and a half of research in the sciences and natural history, still going strong.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A different kind of swan princess.

A time capsule of Floridian history fights to survive on the banks of Chokoloskee Bay.

Marta Becket's hand-painted theater in the desert.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

Named after an outlaw who used the basin as a hideout.