This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Striking images of New Orleans history, including colonizers, soldiers, Klansmen, scientists, sharecroppers, and more, are depicted in frescoes that line the walls of this transportation hub.

This 45-story tall abandoned skyscraper is the third tallest building in New Orleans and Lousiana.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A local landmark with generations of spraypainted messages, and more being added each day.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

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

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

What is the Thing?

A devilishly named gorge that was a sign of salvation for many pioneers.

A stunning landscape of bunkers that once stored chemical weapons.

Home to the only outdoor municipal elevator in the United States.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

This charmingly homemade amusement park has been growing for 40 years.

The magic's in the hole!

An unusual geological feature towers over the remains of a dark episode in United States history.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

Miraculous tree that seems to sprout out of solid rock.

A popular rock that acted as a waymarker for American pioneers.