Castello a Mare (Koules Fortress) in Heraklion, Crete Greece
(Unsupported https://embed.truvvl.com/@aboutheraklion/castello-a-mare-koules-fortress-in-heraklion-crete-greece-travel-crete-heraklion-ocd-photogr-20210425t200005843z)
It was possibly fortified by the Arabs in the 9th or 10th century