Pyramid I, Calakmul, UNESCO World Heritage Site, Calakmul Biosphere Reserve, the largest tropical forest reserve in Mexico, Campeche, Mexico, North America

color image photography outdoors three people people climb scenic scenery history ruin ruins mayan ruin mayan ruins mayan culture unesco world heritage site tourist travel travel destinations horizontal climbing architecture scenics built structure historic stone pyramid i pyramid calakmul unesco world heritage site calakmul biosphere reserve tropical forest reserve campeche mexico north america