One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

A museum, art project, and institution that demands we look at the world around us in a strange new way.

An alley covered with 20 years of bubble gum.

A Mysterious Masonic tomb in San Luis Obispo.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

The commemorative stone column conceals a secret laboratory.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The monumental home of Prussia’s eccentric "Cannon King."

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Once the home of a hermetic monk, this cave now houses a small church.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

The home of one of California's most important horticulturalists wilts amidst a lovely park.

A popular winter vacation destination for migrating monarch butterflies.

Colorful Native American paintings are hidden within this small cavern.

Each year, one talented artist puts on a show sculpting twelve butter-based busts of dairy princesses.