This peaceful garden is hidden on the grounds of a spiritual organization founded by a pioneer yogi.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

One of the world's longest murals depicts the history of diversity in Los Angeles.

A multimedia experience that chronicles the atrocities of racism.

The final resting place of a space program monolith.

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

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.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The classic Atari game's iconic aliens have invaded downtown San Diego.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

This San Diego museum, housed in a former Navy training facility, is dedicated to preserving women’s historic achievements.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This massive underground salt mine now holds a sci-fi theme park in its depths.

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

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.