A remarkable lava formation encloses a line of Buddhist statues that can't be accurately counted, according to local mythology.

A Spanish artist builds his own castle.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A nearly unconquerable island-fort in the Indian Ocean.

The remains of what was, not so long ago, the world's largest city.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

A once-stately trading fort is now a ruin slowly being consumed by the sea.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This ancient Spanish castle sits high upon a hilltop.

How Quincy, Florida became the richest town per capita due to one man's shrewd business acumen and taste for fizzy drinks.

A beautifully detailed Victorian house designed to be easy to flee, built by a man haunted by fire.

The ruins of a once massive plantation are now a private residence hidden in the Florida wilderness.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.