Exact replica of the ancient monument, but much, much lighter.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The whole world in one water tank.

Memorializing an American tragedy of massive proportions.

This alley-cum-fan gallery in the ex-Nirvana drummer's hometown holds the world's largest drumsticks.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A park full of outsider art, created by college students studying outsider art.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

A table rock formation that has been intriguing West Virginians for years.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

The largest guitar store in the world has been visited by some of music's all-time greats passing through upstate New York.

A natural gas leak provides a flickering flame beneath a waterfall.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

A beautiful 62-acre Catholic shrine and botanical garden.