The third tallest lighthouse in America once guided author Stephen Crane to safety.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

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

An ode to "The Queen of Appalachia."

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

A bronze sculpture honors the 12 black students who attended the first integrated public high school in the segregated South.

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

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

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

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

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

The world's largest version of this iconic puzzle cube is located in Knoxville, Tennessee.

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

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

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

Sip mead from an East Nashville apiary while snacking on barbacoa tacos.

Mile-long cave system near Great Smoky Mountains.