Aljojuca Municipality is a municipality located in central eastern Puebla, Mexico. It is bordered by the municipalities of San Juan Atenco to the south, Chalchicomula de Sesma (Cd. Serdan) to the southeast, Tlachichuca to the east, San Nicolas, Buenos Aires to the north, and San Salvador El Seco to the west. Nearby is the highest peak of Mexico, Citlaltepetl or Pico de Orizaba. Local attractions include a 1 km-wide volcanic crater lake, known as the Laguna de Aljojuca, a 19th-century church, completed in 1906, a 17th-century church, and the ruins of the hacienda Cascantla.