Listed by Engel & Völkers Greece, Argyronisos—also known as Silver Island—is one of a small number of privately owned islands in the country. Many of Greece’s thousands of islands are protected or publicly owned, making privately held islands with existing homes and infrastructure relatively uncommon. RELATED: This $39.5 Million Island in the Bahamas Comes With a Private Helipad and Deep-Water MarinaThe private island includes multiple whitewashed villas. Engel & Völkers GreeceInstead of a single main residence, the island is home to 11 stone buildings tucked into the landscape. Engel & Völkers Greece