Dolmen del Prado de Lácara Monument · La Nava de Santiago, Tierra de Mérida - Vegas Bajas, Badajoz Image of La Nava de Santiago, not of the place itself. Located beside the EX-214 road between Aljucén and La Nava de Santiago, it is a megalithic passage tomb from the late Neolithic (late 4th or early 3rd millennium BC). The passage is about 20 m long and the chamber, of polygonal plan and about 5 m in diameter, is formed by five great granite slabs over 5 m tall (5.2 m in total). It is the largest dolmen preserved on the Iberian Peninsula. It was declared a monumento histórico-artístico (Monumento Histórico-Artístico, Spain's heritage designation in force between 1931 and 1985) in 1931 (today a Bien de Interés Cultural, Spain's highest level of heritage protection, under Ley 16/1985). 1931 (declaración como monumento nacional) Photo: Amfeli (CC BY 4.0) What to see and do in La Nava de Santiago