This Tennessee manse was built so opulent that the very utilities doomed it to fail.

This structure among the trees was the result of divine inspiration.

This abandoned nuclear cooling tower casts a shadow over a bucolic town.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.

This improbable contraption was passed down through five generations of industrious Tennesseans.

The alley connecting two of country music’s most historic venues has a rich history of its own.

This museum pays tribute to the Cherokee leader who created a written language for his people.

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

A key producer of charcoal iron in the early 1800s, the structure still stands today.

Victorian-era Egyptomania left its mark on this Nashville landmark.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

Mysterious library of an infamous financier and spiritual seeker.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

This mansion turned restaurant was once a pitstop for Al Capone during his travels.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

A restored, one-room African-American schoolhouse in the diva's hometown now preserves the legacy of its most famous student.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.