Ключевые слова: ancient, astronomy, black, cancun, caracol, chichen, chitzen, civilization, el, excurtion, heritage, interest, itza, maya, mexican, mexico, observatory, people, piramid, point, pyramid, ruin, ruins, site, snail, stone, tour, tourist, tourists, tropic, tropical, unesco, vacation, vacationers, visitors, white, wonder, wonders, world, yucatan,