In the afternoon our group arrived at the ancient city of Coba, located in the middle of the jungle. The Mayan name Coba means ‘ruffled waters’. It probably refers to the lakes in the area. Coba is located between two lakes and is close to three others. Since surface water is not common in the Yucatan peninsula, it makes sense that the Mayans built their city in an area among lakes. Coba was at one time a very large city spread over 80 square kilometers/30 square miles and was once home to around 50,000 people . Of the 6500 buildings which have been found at Coba only 10% have been excavated. The site was built during the Classic Period (600-900 A.D.), but also experienced a building boom in the Early Post Classic period dated 925 A.D – 1200 A.D. (from wikipedia). Here is Coba site map located right at the entrance.