 The ruins lie among the tropical rainforests of northern Guatemala that formed the <unk> of lowland Maya civilization . The city itself was located among abundant fertile upland soils , and may have dominated a natural east – west trade route across the <unk> Peninsula . <unk> trees at the <unk> park include gigantic <unk> ( <unk> <unk> ) the sacred tree of the Maya ; tropical cedar ( <unk> <unk> ) , and Honduras mahogany ( <unk> <unk> ) . Regarding the fauna , <unk> , white @-@ <unk> <unk> , gray foxes , <unk> 's spider monkeys , <unk> monkeys , <unk> eagles , falcons , <unk> <unk> , <unk> , <unk> , green parrots and <unk> ants can be seen there regularly . <unk> , <unk> , and cougars are also said to <unk> in the park . For centuries this city was completely covered under jungle . The average annual rainfall at <unk> is 1 @,@ <unk> millimetres ( 76 @.@ 6 in ) . 
