National Geographic Collection

Discover the secrets of revolutionary structures in Ancient Megastructures. Certain landmarks have captured the imagination and awe of modern-day architects and engineers around the world as they work to solve the mystery of how their ancient forebears were able to construct such beautiful, timeless and revolutionary structures with none of the machines and materials available to modern engineers.

Commemorate a century of Titanic with this triple release from NATIONAL GEOGRAPHIC.
It was mankind's largest and most magnificent machine - the Titanic, the gigantic ship that was supposed to transport people from Europe to the United States. Filled with dreams of the future and a strong belief that man could invent himself out of anything. Titanic was the ship that could not sink. Until the fateful night of April 15, 1912, when it hit an iceberg on its maiden voyage and sank - leaving 1,495 people in the cold grave of the sea.

Explorer takes viewers around the world, opening a window on hidden parts of the world, unlocking mysteries both ancient and modern, and investigating stories of science, nature, and culture.