Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

One of the largest, oldest, darkest, quietest motel rooms in the world.

A view-altering observatory at the University of Texas.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

Canyon walls shrouded in ferns.

European castle ruins in an American state park are actually the product of death and grief.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Rare recess caves fill this unbelievably beautiful Ohio park.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

This woodland architectural installation acts as a camera obscura for the heavens.

Couple's personal collection of pinball machines turned public pinball museum.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Rustic natural hot springs in the deciduous rain forest.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.