Pijijiapan and Izapa are on the Pacific coast and were the most important pre Hispanic cities for about 1,000 years, as the most important commercial centers between the Mexican Plateau and Central America. Sima de las Cotorras is a sinkhole 140 meters deep with a diameter of 160 meters in the municipality of Ocozocoautla. It contains ancient cave paintings depicting warriors, animals and more. It is best known as a breeding area for parrots, thousands of which leave the area at once at dawn and return at dusk. The state as its Museo Regional de Antropologia e Historia located in Tuxtla Gutiérrez focusing on the pre Hispanic peoples of the state with a room dedicated to its history from the colonial period.