This titanic steel chain linking two buildings was installed without permission but instantly beloved.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The house that Southern rock built now stands as a monument to one of the genre's favorite families.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

This quirky curiosity shop takes its cues from the world's bazaars.

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Washington's iconic carousel has a nice piece of Civil Rights history.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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.

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

Live long and prosper in Tennessee.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

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

Enormous lake at the bottom of a unique cave system.

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

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

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

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

More than five miles of underground passageways.