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.

The world's longest known cave system.

Elvis's own personal tropical hideaway.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

The LSU mascot lived on the college campus in one of the most impressive tiger habitats in the country.

Come for the fried chicken, stay for the history at Oklahoma's oldest bar.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A memorial dedicated to the victims of the Columbine High School shootings.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This museum offers an actual time machine back through Colorado's past.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

A house carved into a rock in the 1940s.

Oddly shaped rock formation, misassociated with a nearby utopian community.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.