The Benagil dome — a cathedral of golden rock with a skylight worn through its roof — is the Algarve's most famous sight, and arriving by kayak beats every crowded boat tour. Paddle from Benagil beach along a coast drilled with grottoes, nosing into caves the swell allows. Morning trips get the calmest water and the light shaft at its best. Waterproof your phone; you'll want it.
Featured in Ten wild swimming and water adventures across Europe · Adventure