Cueva de la Lezea Nature · Tiebas-Muruarte de Reta, Comarca de Pamplona, Navarra Image of Tiebas-Muruarte de Reta, not of the place itself. In this cave, flint tools, pottery and the remains of a hearth from the Magdalenian period (between 15,000 and 8,000 years ago) were found in 1973, along with the remains of the Iron Age hillfort of Murugain, within the same municipal boundaries. Photo: München2018 (CC BY-SA 3.0) What to see and do in Tiebas-Muruarte de Reta