Located in the heart of the Upper Douro Valley, within the Douro International Natural Park, Quinta da Fonte do Carneiro offers a unique opportunity to acquire a large agricultural estate in one of Portugal’s most authentic and sought-after regions. Covering between 110 and 120 hectares, the property combines diversified agricultural production, abundant water resources, energy independence, and a collection of traditional schist stone buildings that give it a distinctive character. The estate includes approximately 9 hectares of premium vineyard under Integrated Production, planted with some of the Douro Region’s most renowned grape varieties, including Touriga Nacional, Touriga Franca, Tinta Roriz, and Tinta Barroca. It also features around 25 hectares of organic almond orchards, 10 hectares of organic olive groves, and 11 hectares of cork oak woodland. Approximately 60 hectares remain available for agricultural expansion or agroforestry projects. The property stands out for its abundant water resources, including three boreholes with a minimum flow rate of 10 m³/hour each, a private underground distribution network, three reservoirs with an approximate capacity of 50 m³ each, and a pond, ensuring a high degree of autonomy and sustainability. In terms of energy, the estate benefits from its own transformer station connected to the national grid, as well as two photovoltaic units with a combined installed capacity of 15 kWp. Scattered throughout the property is a collection of traditional schist stone buildings, including two independent structures with gross construction areas of 121 m² and 126 m², as well as a third building of approximately 130 m². All are in excellent condition and offer significant potential for rural tourism, wine tourism, events, or boutique accommodation. The estate also includes a support house equipped with a kitchen and bathroom, along with several agricultural support buildings. The size of the estate, its water resources, existing infrastructure, established production capacity, and future appreciation potential create exceptional conditions for a premium agricultural project, a boutique wine estate, a distinctive tourism venture, or a highly exclusive private retreat. Quinta da Fonte do Carneiro represents a rare opportunity in the Portuguese real estate market.