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

This historic lavatory leftover features two levels of defecation stations completely without context.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

This small-town park in southern Illinois has a 1,000,000-gallon swimming pool and a 100,000-barrel oil well.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

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

What happens when a sculptor has to find a way around a 100-year-old copyright.

The illuminated falls are a gem in North Cascades National Park.

One man's eclectic collection of treasures found at sea.

A Roman-style column in Oregon hides a spiral staircase inside.

A massive sea stack famous for its appearance in The Goonies.

A sculpture of a salmon swimming through a brick building.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

This 19th-century museum inside of a lighthouse is only accessible during low tide.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Where a staggering 747 ships were constructed during World War II.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

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

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

Four hundred granite steps were built into this massive rock by the National Park Service.

An iconic location along the Los Angeles River where countless movie scenes are filmed.