Brown trout preserve of the Órbigo Nature · Santa Marina del Rey, El Páramo, León Image of Santa Marina del Rey, not of the place itself. A preserved stretch of some five kilometres considered one of the best in Spain for brown trout, a regular setting for competitions. The long-standing irrigation of the Presa Cerrajera once drove half a dozen mills. Photo: Claudio Francisco Viloria (CC BY-SA 4.0) What to see and do in Santa Marina del Rey