El Caracol, the Observatory, is a unique structure at the pre-Columbian Maya civilization site of Chichen Itza. El Caracol, which means 'snail' in Spanish, is so named due to the spiral staircase inside the tower. El Caracol 天文台是奇琴伊察前哥倫布時期瑪雅文明遺址的獨特建築。 El Caracol在西班牙文中是「蝸牛」的意思，因塔內有螺旋樓梯而得名。