This odd-shaped relic from the 1964 New York World's Fair found its way back home to Wisconsin.

A historic and oft-filmed prison stands in a Chicago suburb.

The remnants of this Douglas fir predate Columbus's arrival in North America.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

This historic hotel invented the chocolate brownie.

A Japanese temple, old German townhouses, and public chess tables offer a peaceful escape from the bustle of the North Side.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

A unique botanical garden housed in three giant geodesic domes.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

The first permanent memorial to a unique secret weapon of World War II.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

This memorial pays homage to Pueblo's four Medal of Honor recipients.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

A diorama of the Civil War, fought by cats.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

The U.S.' first commercial park dedicated entirely to flying drones.

This sprawling building built in 1890 was one of Minnesota’s earliest and largest mental health facilities.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

Man-made geyser that rises to the exact height of the Gateway Arch.

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.