Tombstones carved to look like tree trunks are used for multiple generations of family members.

An unknown number of cholera victims are buried in two nondescript graves.

A medical facility that has been kept frozen in time.

Meet the "Green Monster" of Monico, Wisconsin.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

Home of St. Urho, the fictional patron saint of Finland.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

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

20,000 pieces in a Frank Gehry-designed building.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This replica of the Greek structure is in the heart of Nashville.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

This historic train station has been converted to a locomotive themed hotel.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.