Enormous lake at the bottom of a unique cave system.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

The tragic death of 19-year-old Mabel Tainter in 1886 led to the construction of this unique Victorian-era theater in the northern woods of Wisconsin.

As the glaciers retreated out of northern Wisconsin, this unique natural wonder was crafted.

This park harkens back to frontier life in Wisconsin.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

An ode to "The Queen of Appalachia."

A roadside music shop featuring a confounding series of folk art installations.

This steep-walled ravine contains animal-shaped formations made from sandstone.

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

The world's largest otter started his life as a high school shop project.

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

The childhood home of America’s first winner of the Nobel Prize in Literature.

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

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The large rock formation where the Shawnee prophet Tenskwatawa stood and encouraged his warriors during the Battle of Tippecanoe.

Walk in the footsteps of the famed astronaut at Purdue University.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

Kentucky's longest operating jail is now a spooky spot to spend the night.

The museum showcases the largest private silver collection in Canada, featuring 3,333 pieces.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

This Art Deco landmark claims to be the longest bridge over the shortest span of water in the world.

This bushy bug is one of the unsanctioned public sculptures that have survived in Regina.