Ribadeo

Ribadeo needs 1 day: touring the town, with its 'indiano' mansions built by emigrants who made their fortune in the Americas, and visiting the nearby Playa de las Catedrales (Cathedrals Beach), with its rock arches up to 30 meters tall carved by erosion, only accessible at low tide. June-September brings the mildest weather, though beach access depends on the tide year-round. It's inexpensive, though in high season it requires booking beach access in advance due to the visitor cap. Its Playa de las Catedrales, a designated Natural Monument, requires an online reservation because visitor numbers are limited to protect the rock formation.