These historic buildings once housed the headquarters of one of the most infamous gangs of New York.

Visit the site of a subway powered by nothing more than air--and lots of it.

Reverend Jen's unique museum/living room showcases her troll collection.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

An accidentally hidden library containing the ephemeral history of New York.

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

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Walk over a 150 year old manhole.

Try not to get slimed in Tribeca.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

One kilometer of thick brass rod laid out before your eyes.

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

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A prohibition era watering hole for the police.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

An eclectic trailer park retreat in the middle of the California desert.

A library of rare occult books in Los Angeles.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Most famous work of one of Frank Lloyd Wright's sons.

Magical-looking cottages that inspired one of the most famous animated films ever.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

A walk through the historic city center, under the streets of Seattle.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.