Incredible labyrinth of man made caves.

Colorful and chaotic stacked hotel in North Holland.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

The largest airborne operation in history was launched to capture this bridge.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

A beautiful maze marks where three countries meet.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

A Roman-style column in Oregon hides a spiral staircase inside.

Home of Howard Hughes' Spruce Goose.

The wooden airship was the largest flying boat ever built.

A beautiful 62-acre Catholic shrine and botanical garden.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

One man's quest for the ultimate road trip vehicle.

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

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

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

North America's largest accredited model railroad museum.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A hidden courtyard houses early 20th-century plaster masterpieces.

One of the largest trees of its kind in California.

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

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

This Pringle-shaped ledge makes for the perfect photo op.