World's largest Christmas store.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A 30-foot man on a penny-farthing bicycle rides along the banks of the Mississippi.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A museum devoted to the victims and the survivors of the most catastrophic fire in American history.

Once known as the Illinois Asylum for the Incurable Insane.

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,” this was also the inspiration for Disney’s “Sleeping Beauty.”

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.