Mexico has one of the most important hydrographic networks in the world thanks to the mountainous character of its territory, which has propitiated plenty of rivers, lakes, cenotes (wells), falls and springs.
The Usumacinta River is one of the mightiest in the country followed by the Grijalva River. Other great rivers are the Coatzacoalcos, the Pánuco, and of course the famous Rio Bravo, which marks the border with the United States and is the longest of the country and the second longest in the northern part of the continent.
Undoubtedly one of the most interesting locations offered in Mexico are its abysses, which are among the deepest and most spacious of the world. The Sótano de Barro (Cellar of the Mud), in the State of Querétaro, has the third deepest vertical shaft in the planet: 410 mts (1,345 ft); at the bottom of it there is a forest with a diameter of over 400 meters (1,312 ft). In the State of San Luis Potosi there is the Sotano de las Golondrinas (Cellar of the Swallows), which is one of the deepest and most beautiful in the world as well, with a vertical drop of 376 meters (1,233ft).
Other locations worth mentioning are the cenotes (fresh water sink caverns) in Yucatan and Quintana Roo which were formed by the collapse of the limestone surface. The cascades of Agua Azul (Blue Water) and Mishol in Chiapas, El Salto de Eyipantla, in Veracruz, the Cola de Caballo in Nuevo León, the Basaseachic cascade, in Chihuahua and that of Taquín, in San Luis Potosi, are a part of the marvels that Mexico offers being the fourth biodiversity in the world, all ready to be captured by the cameras.