Reedbeds and riverside groves of the Tagus Nature · Colmenar de Oreja, Las Vegas, Madrid Image of Colmenar de Oreja, not of the place itself. Special Protection Area for Birds ES0000119, shared between Colmenar de Oreja and Aranjuez, which safeguards the reed beds, riverside groves and wetlands of the Tagus valley; among its species the marsh harrier and the little bittern stand out. Photo: Zarateman (CC0) What to see and do in Colmenar de Oreja