The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Sip cherry liqueur at a bar dating back to 1840.

This Neolithic passage tomb forms part of a World Heritage Site.

The ruins of a medieval monastery named after a type of tree.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

A quirky roadside sign was the subject of a years-long legal standoff over highway right-of-way clearances. 

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

A stealthy Apache hideaway that became the haunting site of a mass grave.

A former department store turned into a quirky restaurant.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The unusual burial monument of Arizona's first governor.

A mysterious "wedding cake" castle in the middle of the urban desert.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.