Crossing Mountains

At south of city of Murcia it is the Lost Valley (el Valle Perdido), a recreative place for families, friends, to make sports as cross-country cycling, football, tennis, hiking. Also for trekking.
Image: Select your way. If you're brave, cross over the tube. Otherwise, on the path. An aerial view here.
Around that area, you can find trenches from the time of the Spanish Civil War.
The entire route here. (Spanish).

Click on image to enlarge it.