Arriving in Lisbon very early, we drove east into the Alentejo farming region of Portugal, stopping to see ancient megaliths. Set near modern cork trees, which are harvested every ten years, the Cromeleque dos Almendres consists of large concentric ovals constructed perhaps 5,000 or 6,000 years ago. A single menhir stands a few kilometers away. Later in our travels through the Alentejo, we visited the Cromeleque do Xerez, just outside of Monsaraz. These stones were moved from their original location when a dam was built to form a reservoir, Barragem do Alqueva, the largest artificial lake in Europe. However, questions linger about the accuracy of placement and interpretation of the stones.