This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Bronze statue marks the spinach capital of the world.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Fantastic collection celebrating the final send-off.

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

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Official museum, hall of fame, and repository of the Texas Rangers.

The only international border marker within the United States.

A small "palace" and museum made of, and devoted entirely, to salt.

Witness to many historic moments in early Texas history.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

This historic train station has been converted to a locomotive themed hotel.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

This Asheville chair museum wants to revive a dying art.

Enormous lake at the bottom of a unique cave system.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

The secret city built by the Manhattan Project.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.