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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

This captivating Bronze Age timber circle spent centuries concealed by the tides.

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

A red-brick beacon stands against the tempestuous Atlantic, on the windiest site in the United Kingdom.

Spend the night in this formerly abandoned traditional Scottish village.

What happened to the three lighthouse keepers who vanished from this place remains a mystery over a century later.

The ruins of a medieval seminary some say is the oldest university site in Scotland.

Wander among the ghostly ruins of an island where civilization flourished for thousands of years.

This museum explores the grim reality of life in the earliest British colonies in America.

Massive prehistoric mammals used these stones as oversized scratching posts.

The southernmost outpost of the Russian Empire in colonial America.

The secret city built by the Manhattan Project.

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

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Eighteenth-century home, where Herschel discovered the planet Uranus.

Inspired by a dream, a hermit carved out a home in this sandstone bank to live a life of contemplation and prayer.

An 18th-century lighthouse built on a 16th-century castle is now a monument to the maritime beacons of Scotland.

A private collection of over 30,000 ancient and modern items showcasing the beauty of Islamic calligraphy.

The largest ancient burial mound in Ohio.

One of the last few period-correct, hand-operated canal locks in the country.