Copenhagen's celebrated theme park and gardens.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A 25,000-square-foot display with dozens of model trains in intricate miniature worlds.

A free park where visitors can learn about and collect 440 million-year-old fossils.

An art deco ice cream shop covered in vintage tiles.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

This former mining town was named the most toxic town in America.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

This two-room shotgun shack in Tupelo is the birthplace of a King.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

A unique outdoor timepiece at a "clothing-optional" resort.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

The world's largest collection of the world's largest objects is in one small Illinois town.

A life-sized recreation of the megafauna that once roamed this region is a feature at the birthplace of American paleontology.

Where beautiful signs live on forever.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A former nuclear facility during the Cold War turned nature preserve.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Walk in the footsteps of the famed astronaut at Purdue University.