When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

This replica of the Greek structure is in the heart of Nashville.

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

Prehistoric animals decorate this popular outdoor park.

One of the few surviving "Wigwam"-themed motels.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

World's largest collection of Coke-related items not held by the Coca-Cola company.

A unique home built by Andrew Jackson Caldwell that also served as a military hospital.

The world's longest known cave system.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

An enormous, inside-out glass globe built in 1935.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A snapshot of the city's fascinating voodoo culture.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

Local legend says the remains of Father Christmas lie within the medieval grounds.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ancient tomb acts as a calendar that keeps perfect time.