The caves pictures above are some of the oldest human settlements in south-western Europe. They date back to the Neolithic Period, approximately eight thousand years ago. These cave sites, and their remnant artifacts have shed valuable inside on life during the prehistoric period in Spain. The caves are built into limestone cliffs, creating a natural shelter for humans and livestock. However, the arid climate, sparse rainfall, and persistent erosion cumulated into an inhospitable agricultural climate, and the economic consequences forced the settlers to move on decades ago. All that remain are the crumbling shells of what once was someone’s home. We saw them everywhere.