This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

Once an integral part of Native American life, very few of these communal New England stones have survived to the present day.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

Try a classic Necco candy bar being resurrected in a small suburban shop.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

These fantastically named natural pools look like something out of a Scottish myth.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A hidden workshop for creating and restoring Papal mosaic masterpieces.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

Breathtaking and huge 430 year old maps of Italy.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Famously misunderstood wonder of the ancient world

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Eighty million natural history specimens call this gargantuan museum home.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.