To get there: from the NA-134, take the “Arguedas Este” exit. A few hundred metres further on, turn right onto a road running perpendicular to the main road (towards “Bandenas Reales Natural Park”). After just over a kilometre, you’ll reach a T-junction. Turn right (towards “Bandenas Reales”). Five kilometres further on, you’ll reach the Bardenas Reales Information Centre. Continue straight ahead; just after this, you can stop at a car park to enjoy a panoramic view of the Bardenas Reales. One kilometre further on, you’ll see an information board about the park’s trails; opposite, an unpaved track begins – take this and follow it for three and a half kilometres. You’ll arrive at the car park next to Cabezo de Castildetierra.
(S/E) From the car park, cross the track and admire the Cabezo. A sign (in Spanish) explains the formation of this site. Take the path to the left of the building behind this sign. Continue to the edge of a small canyon, where a sign indicating "paseo peatonal" shows a way down into the canyon.
(1) Follow the canyon northwards, pass at the foot of the Cabezo and continue to the point where the track for cars crosses the canyon.
(2) Take the track to return to the car park where you started (S/E).