Archaeological and Megalithic Heritage This region of the Alentejo is rich in archaeological and megalithic remains that attest to human presence since ancient times. Roman, Arab, and Christian occupations also left behind a vast heritage of great cultural interest. Castles Churches, Chapels and Hermitages Archaeological Heritage Bulhoa Menhir Corte Serrão Dolmen (Anta Grande de Corte Serrão) Megalithic Complex of Olival da Pega Negrita Megalithic Complex Outeiro Menhir Pedra Alçada Menhir Rocha da Mina Rocha dos Namorados (Lovers’ Rock) Roman Ruins of São Cucufate Santa Margarida Menhir Torrejona Dolmen (Anta da Torrejona) Xerez Cromlech