Nuclear reactor created the plutonium used on Nagasaki.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

A 131-year-old wunderkammer of Texas history.

Two small markers remember the Alamo's feline protectors.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

The Route 66 institution that inspired Taco Bell also served as an important headquarters for Mexican-American social movements.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

This unusually circular centenarian barn became a Route 66 icon.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

This refurbished gas station is one of the oldest in Texas, located on the original Route 66.

The folks at the Devil's Rope Museum want you to get hooked on barbed wire history.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A clear blue swimming hole with hidden caves, still unexplored.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.