Before TV meteorologists, there were weather kiosks. This may be the last one in the United States.

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

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

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

John Hendrix predicted the creation of the "Secret City" built as part of the Manhattan Project.

This hotel was used during the Manhattan Project to house official visitors.

The secret city built by the Manhattan Project.

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

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

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

A historic dam made famous for its turbines and feature in a Hollywood classic.

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

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

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

An abandoned town is hidden in Great Smoky Mountains National Park.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Visit the art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

Over 200 people were buried here with only a small stone to mark their final resting place.

The site of the Scopes Trial contains a small exhibit dedicated to the famous case.

Follow the steps, and this roadside artwork will teach you how to dance.

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

This super steep hike ascends 2,000 feet in less than a mile.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.