Dinosaurs, magic, and wonder are hidden amid the forests of Allaire State Park.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

A unique sculpture park that specializes in the huge and bizarre.

This haunting monument honors the victims of 9/11.

This huge work of functional public art replaced a landfill in New Jersey's Meadowlands.

A retired subway car stands alone in a field in the middle of Queens.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A semi-scholarly approach to sex.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

A World War II-era submarine is stuck in the mud in New Jersey.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Yo, Adrian!

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The remains of a deserted steamboat sit rusting beside an old ferry pier and an abandoned train platform.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

Once America's longest-manned military fort, now an abandoned hulk.

A surprising museum of 20th-century technology.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.