The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The only surviving prototype for Buckminster Fuller's house of the future.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The first declared National Monument in the United States.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An exotic wildlife habitat right off The Strip.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

A museum marks and documents the site of the Titanic's launch.

This single room has survived the centuries with almost no deterioration.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Single runway interrupted by a busy road that cuts across its middle.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Seller of surplus nuclear research materials.

Legends surround this jagged rock formation in the New Mexico desert.

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