"Colinas do Tejo", located in Cascalhos, parish of Mouriscas, on the right bank of the Tagus, about 9 km upstream from Abrantes, is the name of a small farm, forested with centenary olive trees, cork oaks, fig trees, citrus and horticultural and aromatic herbs, to which are added, on the private river beach, ash, lodão and willow trees.

In addition to agriculture and forestry, without resorting to synthetic products, economic activities include the accommodation of visitors in wooden houses, camping and caravanning, the construction and reconstruction of traditional Tagus boats and kayaks, the organization of hikes, mountain biking and kayaking, tree climbing, bird and mammal observation, organization of events, study visits, "pedagogical trails" and actions to defend and conserve the natural heritage.