The hang
Praia das Catedrais, the Beach of the Cathedrals, is about ten kilometres west of Ribadeo, in Galicia. At low tide you can walk among slate and schist arches 30 metres high, shaped like the flying buttresses of a cathedral. Go at low tide, when the sand is fully exposed: the coast is almost flat, so the water covers the beach again very quickly. At Easter and from July 1 to September 30 you need to reserve a free permit. We measured 744 metres; Lonely Planet says 1.5 km.

