In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

The palatial McDonald's that inspired Wesley Willis.

This architectural stunner is one of the few surviving Egyptian Revival theaters in the U.S.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

World's second largest particle accelerator, where nature reveals its secrets.

This historic hotel invented the chocolate brownie.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A real flying saucer, contracted by the U.S. Air Force.

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

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

Home of the only civilian casualty at the Battle of Gettysburg.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This historic train station has been converted to a locomotive themed hotel.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

It was once the base for a series of domestic terror attacks.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Home to items never before seen by the public.