An octagonal folly tower overlooking the sea.

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

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

Five acres of divinely inspired folk art.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

The beauty of urban decay, hiding some dark secrets.

From golden eagles to peregrine falcons, this rehabilitation and education center is a haven for birds of prey.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

An annual celebration of the region's successful elk reintroduction program.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This bridge is haunted by the ghost of a distraught mother.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

An excursion train traverses a picturesque red-rock canyon along the Verde River.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Legend says train robbers stashed their gold within the depths of this unusual cave.