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

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

Ancient Egyptian relief, claimed to depict an electrical light.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

An experimental, automotive replica of Stonehenge.

A geological mystery on Camelback Mountain.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

Experience a charming 1930s version of "infotainment."

This glamorous old building is said to have inspired the Tower of Terror.

Commonly acknowledged as the only public monument to the Devil himself.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

The ancient tomb acts as a calendar that keeps perfect time.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

This simple highway curve has become a comedic pilgrimage site.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.