El Caracol, Ecatepec

Map of the Mexico City basin. El Caracol is the clear blue circle that appears in the northern part of the current Á. F. del Vaso de Texcoco (green area).

El Caracol Solar Evaporation Pond (Spanish: Deposito de Evaporación Solar "El Caracol"), also known as El Caracol de Texcoco or "El Caracol de la Ciudad de México, is a large spiral-shaped retention basin located over the former lakebed of Lake Texcoco, northeast of Mexico City, in the municipio of Ecatepec de Morelos, Mexico.