The route begins in Cavadosa (Cerdedo) and is signposted. We will continue downstream until we reach the pool. The Seixo river forms a wide pool where it falls, forming a 5 m high waterfall.  Several legends speak of the Bichoca Serpent that lives in the pool and guards a treasure. Those who try to take it die.  All those who saw it agree on its large dimensions, which would elevate it to the category of monster. According to legend, oxen were carrying a cart, a plough, and a pitchfork, all made of gold. In a fateful manoeuvre, the pair of animals pushing the load lost control. The cart overturned and plunged down the hillside to the bottom of the pool.