The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The massive machine creates cracking displays of indoor lightning.

This mosaic-covered bar is brimming with curated curios.

It would take 35 firetrucks to fill this enormous glacial pothole.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A deserted hodgepodge of experimental structures designed by nearby university students.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

A fashion designer's dazzling world of Japanese collectibles is hidden in a warehouse downtown.

A chance to sleep among the firs and pines of the Oregon forest.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

An impressive collection of dollhouses and an homage to the frog-leg canning industry.

A prime example of New Orleans' unique architecture these early 20th century homes were built to look like steamboats.

The Ozarks' strangest dwelling.

An abandoned town is hidden in Great Smoky Mountains National Park.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

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

When waves crash onto this section of beach, the rocks sing a song.

There aren't too many operational funiculars around, but Pittsburgh has two!

In Tucson a giant metal snake helps pedestrians cross a busy highway.

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

This nine-story building can be played like an instrument.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.