Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

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

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

An ode to "The Queen of Appalachia."

One man’s religious convictions led him to build this stone castle meant to withstand an apocalypse.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

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

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

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

This former maximum-security prison is creepy, sobering, and supposedly haunted.

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

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

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

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

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This Federal-style plantation house was once visited by Abraham Lincoln to meet with generals during the Civil War.

A natural spring situated on the grounds of the Hawthorne estate.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.