At a mile long, the Fort Madison Bridge is the largest double-decker swing-span bridge in the world.

This Mediterranean castle was built for a millionaire and his giant dog.

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

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

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This ambitious restaurant celebrates the culinary traditions of the Ozarks before 1870.

In Edwin Hubble's hometown, a scale model of the groundbreaking telescope that was named in his honor.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The notorious Wild West outlaw was raised in this unassuming abode.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

A pocket of jungle amidst urban expansion in Panama.

Built in the 1300s, this magnificent building that hosted England's kings and queens transports you to the Middle Ages.

This amazing 15th-century mural remained hidden in plain sight for centuries.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

For over 500 years this timbered alms house has provided a home for elderly residents of Coventry.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

The obelisk honors the cyclist troops who were killed during World War I.