17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Huge standing stones mark a site of megalithic mystery.

A standing relief of a Norman knight whose posture marks him as a Crusader.

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

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

The highest point in Washington state is a volcano covered in glaciers.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A cemetery housing wild west legends in South Dakota.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

Every president in history is immortalized in bronze in downtown Rapid City.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

A Wild West jailhouse that slid down the mountainside.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Ancient pueblos built into the base of a natural canyon wall.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.