From the A Gándara bridge, the path descends along the bed of the Rego das Gándaras on a gently sloping path and follows the Tambre and Cabalar rivers upstream to A Ponte do Sapo, allowing you to enjoy an environment that serves as a backdrop for a beautiful ethnographic site formed of numerous mills and a fulling mill.

This journey of less than 6 km visits 22 hydraulic mills in varying states of conservation. This includes the restored Mezonzo fulling mill, which was used to repeatedly hit textile products such as felt and fabrics to make them firmer and more resistant. It is believed that the origin of this fulling mill may be related to the 12th century Mezonzo monastery, making it one of the oldest on the peninsula.

The trail is surrounded by lush vegetation, creating a wet and fresh ecosystem all year round. It is also home to numerous riverside trees, especially alder, willow, birch and hazel trees.