The most famous walk of the Costa Brava, the Camí de Ronda runs along the cliffs from Sant Feliu south to Tossa de Mar — twelve kilometres of pine forest, secluded coves (Cala Pola, Cala Bona, Cala Salions), and Mediterranean views. The path is well-marked, undulating, occasionally steep, and overall takes a day at a relaxed pace with breaks for swimming.
There is a regular bus back from Tossa de Mar (line 21, around 30 minutes), so most walkers do the route one-way south. Take plenty of water and a swimming costume — every other turn opens onto a swimmable cove and resisting them is pointless.