These ancient structures still stand - but the people who built them remain a mystery that history can’t fully explain.

During the season eight premiere episode of "The UnXplained" host William Shatner takes viewers all over the world to examine ancient structures.

Egypt’s Great Pyramid of Giza may be one of the most iconic landmarks on the planet but, beneath its surrounding sands, there ...

For centuries, the Ring Nebula has captivated astronomers with its stunning, glowing appearance, but a recent discovery has ...