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

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The worst road in Colorado is the main gateway to some of its highest peaks.

This stunning, technicolor array of geysers has occupied Ferril lake since 1908.

An unexpected alley with light shows and nature views.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A river runs through this remote valley in a very unexpected way.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

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

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Former meatpacking facility turned vertical farm and sustainable business complex.

One of few lasting examples of the brief octagon craze that developed into folly.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

See what remains of a once grand ancient Roman circus.

Da Vinci's equestrian statue, 500 years in the making.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The secret medieval communication system will whisk your words above the noise of the crowd.

Graffiti-clad ruins of an abandoned 1980s industrial site with a toxic past are nestled among residential houses.

Legend claims these are the heads of executed criminals, magically turned to stone.