At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Huge masonic hall in Philadelphia with lavishly themed rooms.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

Golden Gate Park's historic collection of plants.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Mysterious rocks that ring musically when struck.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Elevated freight railway turned wildly successful urban park.

The unusual private collection of modern-day renaissance man George Musgrave.

This beloved marketplace mascot poops money and grants good luck.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

A converted hangar displays dozens of helicopters, from a famous 1943 rescue chopper to several autogyros.

These lush botanical gardens employ the most purrfect pest control force.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A local prank turned town icon.

Pennsylvanian mass grave and possibly mass murder.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Yo, Adrian!

The oldest surviving botanic garden in the United States.