Recommended walk of about 60 minutes, 3 km, which runs along both banks of the River Nora as it passes through Granda and Colloto.
We start the walk on a downhill path, located on the left when leaving the Apartamentos Antojanes between the white house and the stone wall. We arrive at the village road that we will cross straight ahead to continue along a gravel road, leaving some small houses on the left. Arriving at the river, the walk begins that runs along both sides of the riverbed, and has two bridges, the new one made of wood when arriving at the river and another when arriving at Colloto (30 minutes).
The Colloto Roman Bridgeis considered one of the best works of ancient Asturian civil engineering.
Its exact chronology is currently uncertain, and its probable construction in Roman times is still being discussed. It would form part of the road infrastructure works for the communications route that would link the lands of Cantabria with Gallaecia, crossing the center of Asturias. The first documentary references written about the Bridge are from medieval times; likewise, since the end of the 16th century there is news of various minor works carried out on it, and for this reason it is one of the best-preserved old bridges in the Oviedo area.