One of the deadliest American air disasters is nearly forgotten in Brooklyn.

An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

A decommissioned military complex that's now a modern industrial park.

An artist's cute bronze subway sculptures belie his violent artistic past.

Tucked in the back of this amazing antique store is an important piece of medical history.

The most confusing clock in New York.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Salute the leader of the proletariat.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An ancient Egyptian temple in the middle of Madrid, Spain.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

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

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

The last of its kind in the country.

Medical and zoological curiosities for sale.

Shop selling 500 flavors of soda has something for everyone.

Resting place of Hollywood's immortals is also site of summer film screenings.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.