Hauntingly beautiful totem poles left by the Haida.

World's only nuclear reactor operated by liberal arts undergraduates.

Moorish signal station on a stratgic rocky outcrop.

These azure waters were thought to lead to the Mayan Underworld.

The final resting place of the great navigator, or maybe his brother.

Even King Tut was intrigued by the glass of the Great Sand Sea.

A chapel on a volcanic core, marking the end of a successful journey.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An old slave lookout in Cuba's historic sugar cane fields.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

A Gothic cathedral created from volcanic rocks.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

Windblown rock formations in an ancient Roman quarry.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

A Mayan village preserved for centuries in volcanic ash.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

An ancient Viking village in North America that predates Columbus by 500 years.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

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

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.