The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This water tower has been a staple of the Rochester skyline since 1931.

This sky-high radio mast is formerly the tallest man-made structure in the world.

This spooky statue sits outside a famous Prague theater.

An Orwellian sculpture with eyeball cameras watches passersby.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

Caves that can't seem to quit producing the remains of prehistoric humans.

Home with Gothic windows featured in a famous painting.

The world's largest Holstein cow.

A true roadside icon standing on the same plains that the herds once roamed.

One man's quest to save his town with a trail of record-breaking sculptures.

Home of a French nobleman's short-lived attempt at raising cattle in the Badlands of North Dakota.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

A cemetery housing wild west legends in South Dakota.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Every president in history is immortalized in bronze in downtown Rapid City.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

Just a man taking his prehistoric pet for a stroll.

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A museum, walk-through diorama, and library nestled under one castle-like roof.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.