These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The legendary building that needed ghostly approval before being built.

Historic funicular railway, believed to be the shortest railroad in the world.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

America's most famous piece of self-built architecture.

A walk through the historic city center, under the streets of Seattle.

100-year-old shipwreck you can walk up to at low tide.

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

A heavenly experience, right here on Terra Firma.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A collection of colorful dinosaurs hidden in an actual rainforest.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An extensive collection of ancient Egyptian artifacts and mummies.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A tourist attraction founded around a slumping cabin.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

A beautiful 62-acre Catholic shrine and botanical garden.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The magic's in the hole!

Tens of thousands of tiny birds swarm into one school chimney every fall.

Portlandia is the second-largest copper repoussé statue in the United States.