San Juan de Gaztelugatxe, a castle on the rock at sea
https://www.visitbiscay.eus/en/-/san-juan-de-gaztelugatxe-castillo-de-roca-sobre-el-mar
WebSan Juan de Gaztelugatxe is really a must if you are coming to Bizkaia. A tiny yet amazing cone-shaped islet, 35km east of Bilbao, in the coastal town of Bermeo, bearing a humble shrine dedicated to St John the Baptist at 150m above sea level. The name in Basque has two meanings: gaztelu-aitz, castle rock, or gaztelu-gatxe inaccessible castle.
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