The most popular of the many walking routes in the Sierra de Cazorla nature reserve, the Cerrada de Elías-Nacimiento del Borosa-Laguna de Valdeazores, to give the 22-kilometer path its full name, passes through tunnels carved out of the rock face and offers spectacular scenery, plenty of water, and a rich variety of flora and fauna.
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Top hiking trails in Spain

From the Canary Islands to the forests of Navarre, a look at some of the spots that offer the most beautiful scenery in the country