A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Cooks at this tiny takeout spot grind their rice flour in a stone mill each morning for perfect cheung fun.

A prohibition era watering hole for the police.

The greatest real estate coup of all time.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

Rare mummified forest could offers a glimpse into how our environment has been changed by humans.

A hands-on traveling collection of the innovative devices of yesteryear.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

Few of the many visitors to this resort town know of its hidden Maya ruins.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

The resting place of a Civil War celebrity's amputated limb.

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

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.