Downstream of Vila Velha de Ródão, Rodao doors are an imposing geological formation where the Tagus breaks of between two craggy walls (about 170 feet tall) for a deep lake, excavated by a supposed ancient waterfall that was disappearing until river level with the Lake. Besides being habitat for largest colony of Griffon Vultures in the country, is a privileged place for the investigation of fauna and avifauna, where they can be observed 116 species of birds, many of which are considered endangered species and some rare.

A dam inaugurated in 1973, 43 metres tall, located between the mouth of the Ocreza river and the Portas de Ródão. Fishing, swimming, windsurfing, skiing, sailing, jet skiing and motor boating are permitted.

The Ocreza river flows along about eighty kilometres, from its spring, on the Gardunha Hill, to its mouth, on the Tagus river. It has several tributaries.

A cement dam with counterforts built in the 1980s on the Ocreza river. It produces electricity. Fishing, swimming and sailing are permitted.