Laguna del Maule (volcano) about fourteen shield volcanoes and stratovolcanoes that have been degraded by glaciation. The Laguna del Maule volcanic field covers a surface area of and contains cones, lava domes, lava flows, and shield volcanoes. There are 130 volcanic vents at Laguna del Maule. The lake is surrounded by 36 silicic coulees and lava domes. Over of the field is covered by these rocks, and volcanic ash and pumice produced by the eruptions has been found in Argentina. Presently some summits around Laguna del Maule reach altitudes of . The volcanic field lies at an average height of . Among the various
Laguna de Términos primarily through the effect of ocean tides. On the surrounding barrier islands, beach ridges, and mangrove coastline there are several Late Postclassic Maya sites. The city of Ciudad del Carmen is located on Isla del Carmen, between the lagoon and the Bay of Campeche. Twenty-nine percent of the lagoon is covered with seagrass. The lagoon was designated as a federally protected area for flora and fauna in 1994 by the Mexican government because of the importance of the biological ecosystems provided by its estuaries. There have been 1,468 identified fauna species found within the protected area of Laguna de Términos;