Celebrating the accomplishments of Black firefighters in Los Angeles.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

First LEED-certified gas station in the United States.

The ghostly remains of an accidental sea.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

A one-of-a-kind collection of a unique medium.

A crumbling hospital from the 1850s on Roosevelt Island.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

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

NASA's leading space science lab started by a co-founder with deep ties to the occult.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A former utopian healing center created by a huckster and built by derelicts.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

Megachurch turned Catholic church comprised of 10,000 glass panes.

Church and home-museum of a 1920s female revivalist preacher with a very sordid past.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.