Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Despite its name, this route in southern Utah offers a heavenly day trip.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

One Confederate statue that accurately reflects the ugliness of its subject.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Elvis's own personal tropical hideaway.

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

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Live long and prosper in Tennessee.

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

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This replica of the Greek structure is in the heart of Nashville.

The secret city built by the Manhattan Project.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

The world's largest model of our planetary system.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This chimerical bridge/tunnel appears to dead end right into the sea.

Swedish skyscraper with a 90° twist.