Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

Steel remnants of a bridge make up a unique sculpture along the banks of the Illinois River.

The world's third-largest scale model of the planets.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

Legendary site where an evil bishop was devoured by rodents.

This marvelous array is one of the largest collections of mechanical instruments in Europe.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The fairy tale castle of the "fairy-tale king."

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

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

Strange physical sensations and optical contradictions keep visitors coming back for more.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The arch that celebrated the completion of the Lincoln and Victory highways.

This beloved roadside attraction welcomes visitors with his signature neon smile.

Bill Murray bowled three straight strikes here at Reno's "Taj Mahal of Tenpins."

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

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

Wisconsin's most celebrated export gets the royal treatment on I-94.

A unique botanical garden housed in three giant geodesic domes.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.