The historic tall ship is one of just three of its kind still sailing open waters today.

This little dolphin is the first monument dedicated to the LGBTQ+ community in the southern United States.

This tiny, hurricane-resistant house in Galveston is one of the city's most notable architectural oddities.

A registered historic landmark shrouded in unsettling local legends.

The Grand Canyon of Texas.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A monument to the King's final show, complete with a time capsule.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

This stately clubhouse has showcased German-American culture for over a century.

The largest historic preservation organization in the United States.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

One of the oldest, tallest, and most haunted lighthouses in America.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

A massive tribute to this small county's top agricultural product.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.

Enormous lake at the bottom of a unique cave system.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

A roadside music shop featuring a confounding series of folk art installations.

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

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

The secret city built by the Manhattan Project.

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