El Caracol, the Observatory, is a unique structure at pre-Columbian Maya civilization site of Chichen Itza. El Caracol, which means 'snail' in Spanish, is so named due to the spiral staircase inside ...
Great Pyramid of Giza, purportedly designed by Hemiunu. Credit: Wikimedia Commons, CC-BY-SA 3.0 The Great Pyramid of Giza in Egypt is the largest pyramid in the entire world. It is clearly one of the ...