Come and discover the unique flora and fauna associated with the Cresmina-Guincho dune system and explore, via a boardwalk trail, the Guincho dunes and their geological features. Note: The activities are subject to weather conditions. Duration: 2h00. Minimum: 15 participants. Target audience: Over 12 years old. Registrations: https://atividadesnatureza.cascais.pt/. Organization: Cascais Ambiente. SDG: 15 (Protect life on land).