From the Step Pyramid of Djoser (Egypt’s first pyramid) to the Great Pyramid of Giza (Earth’s largest pyramid), National Geographic’s informative site allows you to visit eight different pyramids by clicking their images in order to gain access to pictures, diagrams, and important facts about these structures. The site also provides a timeline spanning almost 6000 years, from 5500 B.C. to 395 A.D., allowing us to easily put the construction of the pyramids into historical context.