Nature venue
Ribeira do Cavalo Beach
48 locals recommend,
Tips from locals
This beach was rated one the best beaches in Portugal although the access by land isn't easy, but there are boating companies that can take you to, and from the beach.
1 hour by car + 20 minute hike. Great day trip. One of the most beautiful beaches in the Lisbon area (maybe in all of Portugal). Just google some pictures.