The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The topiary maze at the Habsburg hunting lodge.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

An artsy hidden staircase leads to breathtaking views of San Francisco.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

First LEED-certified gas station in the United States.

Concrete strongholds stand guard over the Golden Gate.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Most-visited and most-photographed slot canyon in the American Southwest.

A unique geological area spiked with wind-carved rocks that resemble teepees.

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

Dramatic river bend surrounds a natural red-rocked pedestal.