In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

Stroll through a wonderland of stupendous moss-covered trees.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

Walk the whole Mississippi River!

Campus tradition says couples who walk beneath this enormous oak will stay together forever.

Resting place of the Texas A&M canine mascots, who watch the game from the grave with their own miniature scoreboard.

Decades of discarded bottle caps line this alleyway, a fixture of Texas A&M.

Moonbows over Kentucky.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

Artist James Turrell's ode to dawn and dusk on the campus of Rice University.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

Whether his story is true or not, Stiffy Green is the most beloved bulldog in all of Indiana.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

A wartime promise becomes a shrine to Our Lady of Lourdes.

The modern museum honors the achievements of the state's all-star athletes.