At the top of Gaztelugatxe Island stands a hermitage named Gaztelugatxeko Doniene in Basque and San Juan de Gaztelugatxe in Spanish, dedicated to John the Baptist, which dates from the 10th century, although finds indicate the date may be the 9th century is The island is on the coast of Biscay in Bermeo in the Spanish Basque Country in the Bay of Biscay.