hikers climbing to the top of la bola del mundo or alto de las guarramillas in madrid spain.

adventure altitude alto antenna antennas architecture blue bola building climbing cloud del east emission equipment europe famous function grass guadarrama guarramillas hikers hiking landmark landscape las madrid metal mountain mountaineering mundo national nature navacerrada old outdoor outdoors park peak radio red repeater rocket scenic seen sierra signal sky slope spain station telecommunications television top tourism tower transmitter travel was whose