Stone of the Kidneys Curiosity · Muxía, Fisterra, A Coruña A pierced rock in the sacred complex of A Barca under which pilgrims crawl on all fours seeking relief for kidney and back trouble; together with the Pedra de Abalar it completes the ritual of the best-attended pilgrimage festival on the Costa da Morte. Photo: Grela (Public domain) What to see and do in Muxía