The ghost town that ended up on Ebay.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

An iconic location along the Los Angeles River where countless movie scenes are filmed.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

An off-grid art installation that encourages its visitors to imagine a world without waste.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

A hand-built folk art installation covered with messages of God's love.

Version of the French Riviera destroyed by the sea.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

A castle built for love, and abandoned due to heartbreak.

This old mining town, deep in the California desert, has a year-round population of one.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Two thirds of this Montreal neon icon has survived to flash another day.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Abandoned Air Force base that has fallen into disrepair.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

This scout retreat, still in use today, was the filming location for the original “Friday the 13th” film.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.