It has its spring on the Freita hill, in Urrô, and its mouth on the Arda river, in Rossas.

It has its spring on the Nave hill, at Moimenta da Beira, and its mouth on the Douro river, near Castelo de Paiva.

The Ceira river has its spring on the Açor Hill. It is a tributary of the Mondego river's left bank.

Waterfall in Margaraça Woods.

Waterfall in Caratão.

Waterfall in Vila Cova de Alva.

Waterfall in Orchards.

A river that is born on the Estrela Mountain and flows to the Alva river, in Alvôco das Várzeas, in the parish of Oliveira do Hospital. It measures 37 km and has two tributaries, the Lorigo Brook and the Piodães Brook.