For almost 100 years, this site of peace and spirituality has existed on the California coast.

Hopeless romantics will swoon over the sweet story behind this bright and colorful home.

Fake rail crossings mark the site of an influential doctor's demise.

A huge musical instrument played by the ocean.

A tree grown from astronaut seeds which were exposed to cosmic rays.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This legendary urban waterfall creates a dazzling display of rainbows.

Race through the maze, get your name on the sign.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

A house carved into a rock in the 1940s.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Two stone columns flank the grand Venice square, but there were supposed to be three.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This delightful little museum is dedicated to only one thing: pasta.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest operating pharmacy in the world features 800-year-old recipes.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

A museum dedicated to the history and exploration of both popular music and science fiction.