The Great Dolmen of Zambujeiro, 13km southwest of Évora, is Europe’s largest dolmen. Under a huge sheet-metal protective shelter in a field of wildflowers and yellow broom, stand seven stones and a 'closing slab' that connects the chamber with the corridor. Each is 6m high and together they form a huge chamber around 5m in diameter.
Unfortunately, you cannot enter; the entrance is blocked, but you can peer in from the high mound behind. Archaeologists removed the capstone in the 1960s. Most of the site’s relics are in the Museu do Évora .