Opulent downtown movie theater now houses cars as an indoor parking garage.

The only surviving prototype for Buckminster Fuller's house of the future.

A Beaux-Arts triumph set to become Ford's innovation campus

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

Astounding collection of coin-operated games and automata.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

This sprawling bookstore spans four floors and has more than a million books in stock.

Half of a house.

This replica of the Greek structure is in the heart of Nashville.

This award-winning men's bathroom was just too beautiful to not allow women to see.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

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

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

A giant Troll lurks under one of Seattle's oldest bridges.

San Francisco's newly reopened hands-on science museum.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

A toxic ghost town sitting atop a massive coal fire.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.