Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

When flour explodes, it's not a pretty sight.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

The only arched bridge made of stone on the entire Mississippi River.

This old residential building was once the largest flour mill in the world.

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

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

Years of archaeology, just chillin' by the water cooler.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

To find the "unicorns of the deep" you've got to go downstairs.

These pretty kitties killed and ate as many as 135 railway workers.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

This sign designates the road that leads to the infamous Area 51.

The world's last remaining store of its kind.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This legendary urban waterfall creates a dazzling display of rainbows.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

This black shoreline is made up of exploded lava particles.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.