One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

This simple, broken column marks the final resting place of one of America's most famous explorers.

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

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

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

These early tent-shaped grave coverings are unique to Appalachia.

It may take some time to locate, but it's sure to warm even a heart of stone.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Enormous lake at the bottom of a unique cave system.

A plaque commemorates a Victorian scientist's monumental discovery about waves.

This small memorial honors a ferocious feline and local hero.

This colorful mosaic remembers one of Britain's most deadly peacetime fires.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

This museum offers a glimpse into early 20th-century Glasgow life.

The fountain marks the area where hundreds of accused witches were burned at the stake.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

It's believed this well was once plagued with evil spirits until St. Columba purified the water.

The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.

A glacial pothole was once a hideout for a notorious Scottish outlaw.