This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Every October, one of the largest migration of mammals in the world thunders through Boma National Park.

This tiny patch of arid sand sits in one of the greenest states in the United States.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Home to some of Indiana's last bison herds.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Bad farming practices caused this unnatural natural wonder.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Foragers once flocked to this big beautiful bayou to hunt for pearls.

The only Florida state park with publicly accessible caves.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.

This is one really big nut.

It's bad manners to eat and drink on the subways of Tokyo, unless the train is this bar. 

This historic factory peddles classic toys from the picturesque English county of Devon.

On a remote island in the northern reaches of Lake Michigan, a museum of collectibles collides with a vintage toy store.

This museum pays tribute to the Cherokee leader who created a written language for his people.

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

This limestone outcropping was once a ceremonial site for ancient Native Americans.

An engraved boulder marks the spot where Patsy Cline's life ended in a plane crash.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.