A likeness of Da Vinci's mysterious painting smiles at passersby from the side of a barn.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

A unique blue and yellow phone booth in America's "Little Sweden."

This century-old painting of a portly 10-foot-tall man spent years hidden behind plaster.

This historic early-20th-century building still boasts some of its original features.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

A half-size replica of the World Trade Center towers above Tulsa.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

Once in disrepair, the house where the 1983 film was shot has been restored and turned into a museum.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

European castle ruins in an American state park are actually the product of death and grief.

This 36-foot-tall bronze Lady Liberty holds a real flaming torch.

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

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

A medieval castle in the middle of rural Texas.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A town pays homage to its namesake.

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

This downtown Dallas art installation is always on the lookout.

This sculpture of a bowler hat is complemented by a matching umbrella a few blocks away.

Three hundred years of preserved Spanish colonial history in San Antonio.

The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

The 19th-century ruins hide deep in an overgrown forest.