Pennsylvanian mass grave and possibly mass murder.

The oldest continuously inhabited street in America.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

When ecosystems collide in the arid Southwest.

A fascinating little museum all about the rich history of Peru’s famous plant.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The largest retailer of seashells in the world.

The only diamond mine in the world where you can keep what you find.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This iconic science fiction house still looks like something from the future.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The fairy tale castle of the "fairy-tale king."

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Less a museum than a bizarre fantasy world created by artists and engineers.

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

Numerical symbolism abound at East Asia's oldest observatory.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This small town bank is very aware of its name thank you very much.

Nature's biggest mammal swims in landlocked Oklahoma.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

Massive still life just off the highway in Kansas.