Pinturas rupestres de la sierra de las Viñas y sierra de las Calderitas Nature · La Zarza, Tierra de Mérida - Vegas Bajas, Badajoz Image of La Zarza, not of the place itself. In the rock shelters of these two mountain ranges south of the village, prehistoric cave paintings are preserved, the oldest evidence of human presence in the municipal term. Photo: Frank Vincentz (CC BY-SA 3.0) What to see and do in La Zarza