The El Pinacate and Gran Desierto de Altar Biosphere Reserve is a site with exceptional universal value, that is, unique in the world, declared as a protected natural area in 1993 and designated as a natural heritage of humanity by UNESCO in 2013.
The Reserve has the highest concentration of “maar” type craters in the world, and its volcanic shield has more than 500 cineritic cones, lava flows, stream beds, alluvial fans and mountain basalt, tufa and granite massifs.
The great desert of Altar is the largest active dune field in North America where unusual star dunes are formed that only exist in a few locations in the world.
The geoforms are very varied and contrasting, which results in a great variety of habitats with the corresponding biological and landscape richness.
El Pinacate and Gran Desierto de Altar Biosphere Reserve is the most biodiverse desert in the world.
The Sonoran Desert, which covers part of the states of Sonora, Arizona and California is considered the desert with the greatest biodiversity in the world.
The awe-inspiring craters at the El Pinacate and Gran Desierto de Altar Biosphere Reserve are unique in the planet.