A small, uncrowded gallery of contemporary works on Sardinian sand and rock, a genuinely local, un-Instagrammed alternative to…A small, uncrowded gallery of contemporary works on Sardinian sand and rock, a genuinely local, un-Instagrammed alternative to the Med's big museums, 15 minutes from Olbia's superyacht berths. Created by local divers and artists in the 2010s to give Golfo Aranci a cultural draw of its own, distinct from the Costa Smeralda nightlife two headlands away. Anchorage: Anchor in Golfo Aranci in 6-10m sand, good shelter from mistral; steps from the Costa Smeralda circuit. Hazards: No site-specific hazards noted, brief normally. Plus