Gypsum cliffs of the Tajuña Nature · Perales de Tajuña, Las Vegas, Madrid Image of Perales de Tajuña, not of the place itself. Gypsum cliffs formed in the Miocene that flank the Tajuña valley and trace an almost desert landscape of gullies and collapses; on them grows Iberian gypsum vegetation, priority habitat 1520 under the European directive. Photo: Nicolas Vigier from Madrid, Spain (CC0) What to see and do in Perales de Tajuña