PHOTOS

Dendera Wall Carving: Wall carvings at the Dendera Temple complex in Egypt depict bulb-like objects that Egyptologists believe to be lotus flowers. According to others, including some ancient alien theorists, the carvings suggest that ancient Egyptians used electric lighting to illuminate their tombs

Great Pyramid of Giza: Some ancient alien theorists believe that visitors from other planets helped humans build architectural wonders like Egypt's Giza Pyramid. Not only is Giza an incredible feat of engineering for its time, but it lies at the intersection of the longest lines of latitude and longitude.

Teotihuacan Pyramid: According to ancient alien theorists, extraterrestrial visitors may have shared their understanding of space with the humans who built these architectural wonders.