The Oliveira da Serra - olive oil producer/Brand, next to Herdade do Marmelo, honors the Portuguese olive grove and represents the ultimate exponent of technology at the service of olive oil quality and environmental sustainability. It is a landmark of modernity in the country. The visits are accompanied by a guide that explains all stages of olive oil production and takes you to know the largest Portuguese olive grove. There is also a stop at Marmelo Dam, an infrastructure integrated into the Alqueva project. At the end of each visit there is a tasting of different varieties of olive oil.