Elvis's own personal tropical hideaway.

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

This huge clock made of flowers and simple machinery was once used a political weapon.

Belly up to the bar in Cowtown, don't forget to buy some boots.

This downtown Dallas art installation is always on the lookout.

A multi-storied adobe complex has been inhabited for more than a thousand years.

These aggressively sustainable art homes look like something out of 1970's science fiction.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The only road through the heart of Glacier National Park.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Famously misunderstood wonder of the ancient world

The walls and streets of the ancient city are peppered with penises.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

A map of Italy made entirely of trees.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

This region of the Perugia municipality has an unforgettable name.

The giant skeleton sculpture is surprisingly well-traveled.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The arch that celebrated the completion of the Lincoln and Victory highways.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.