Cova Bonita (Pretty Cave) Nature · Vallirana, Baix Llobregat, Barcelona Image of Vallirana, not of the place itself. The Cova Bonica is a cave of karstic origin located in the Garraf-Ordal massif, near the les Bassioles development, in an area with numerous quarries in the municipality of Vallirana; it is of medium size, with one main chamber and two side chambers. In it were found 314 bone remains from seven individuals — one adult and the rest children or adolescents — from the Cardial Early Neolithic, around 7,400 years old, together with sheep and goat remains, Cardial pottery, tools of flint, quartz, jasper and rock crystal, and ornaments of red coral and sea shells. It was first excavated in 1936, and since 2008 work has continued there under the Grup de Recerca del Quaternari of the University of Barcelona. Photo: Kippelboy (CC BY-SA 3.0) What to see and do in Vallirana