A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

This feline raises a friendly paw at drivers barreling toward the freeway.

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

The museum houses one of the world's largest collections of glass paperweights.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

Robots, lasers, and whoopee cushions, oh my!

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

Less a museum than a bizarre fantasy world created by artists and engineers.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

This sacred space and gathering spot for the Wyandot Nation has been the surrounded by controversy and confusion.

The holiday spirit lingers year-round in the "Christmas City of the High Plains."

Topeka has its own great wall, and it's covered in colorful images from the city's history.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

Browse through roughly 130,000 titles in the world's largest independent video rental store.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A vinyl-lover's Shangri-La.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

A colorful architectural gem in Seattle's uniquely modern Central Library.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

An institution that preserves the history of institutionalization.

Treehouse motel and treehouse-building school.