Join a guided walk from Penedo to explore a forest of cork oaks, chestnuts, and hazelnuts in Sintra, considered a sacred place by ancient cultures like the Celts and Romans. Led by biologist Filipa Heitor, the 5 km easy-level walk on July 25, 2026, from 10:00 to 13:30 covers the sacred and medicinal meanings of trees, with moments of silence to connect with nature. Meeting point is Café Refugio Do Ciclista in Penedo, Colares. Price: €15 for adults, €10 for youths up to 17 (recommended for ages 8