Cave-Sinkhole of la Serreta Nature · Cieza, Vega Alta del Segura, Murcia Image of Cieza, not of the place itself. Cavity hanging on the left wall of the Almadenes canyon, discovered by cavers in 1972, with Levantine and schematic rock paintings declared a UNESCO World Heritage Site in 1998 as part of the Rock Art of the Mediterranean Basin. Photo: San Juan Evangelista Cieza (CC BY-SA 4.0) What to see and do in Cieza