The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

A tower that pays homage to local sailors who perished under the waves.

The oldest functional consecrated church on Mustang Island.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Walk the whole Mississippi River!

A large stone map of Arkansas awaits visitors to its highest point.

A popular swimming hole that hides one of America's most deadly diving spots.

An exquisite grouping of structures made from 10 tons of invasive saplings.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

The legend of a local monster still haunts this small town.

One of the best-preserved Native American mounds remaining in the southern United States.

A taste of Middle Earth, in the middle of the Bayou City.

A health museum containing a 27’’½-foot intestine.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

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

The highest point in Louisiana, Driskill Mountain at 535 feet above sea level.

One of the few existing, fully functional Showbiz Pizza animatronic shows.