Giant naked man on a hillside.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This reconstructed ancient fort was home to one of the few horse training rings in the Roman Empire.

The largest Walleye statue in the world calls this Minnesota town home.

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

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

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

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

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

An ancient fortification lives on in this Chinese city.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Three hundred years of preserved Spanish colonial history in San Antonio.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.