This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

An abandoned observatory in the middle of the Illinois prairie.

The world's largest collection of the world's largest objects is in one small Illinois town.

Built in 1869, this now-retired structure looks more like a medieval fortress than a county lock-up.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

This giant green head remembers one of America's jazz giants.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Take a self-guided tour through one of Colorado's most elevated mining districts.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

These ruins are all that's left of the former Alabama State Capitol.

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

The first space rock known to have struck a human.

A rusted metal giant pays tribute to Birmingham’s industrial past.

An oil baron's wild paradise and the winner of an ill-fated air race.

Site of the 1926 murder trial of Ernest Burkhart who was involved in the "Reign of Terror."

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

One part antique store, one part curiosities hodge-podge.

Ruins of a once-opulent grand Victorian resort.

Three hundred years of preserved Spanish colonial history in San Antonio.

This stone windmill marks an old, mysterious homestead in what is now central Austin.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

These boots are made for selfies.

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.