ATITLAN, a lake in the department of Solola, in Guatemala. 20 miles long, with an average breadth of 9 miles. It seems to occupy the crater of an extinct volcano, and its depth is reported to be very great. The scenery in the neighbourhood is striking and picturesque, the volcano of Atitlan rearing its head 12,500 feet above the level of the sea. A little Indian town, Santiago de Atitlan, nestles at the foot of the mountain.