The Alyki peninsula, located on the south-eastern side of Thassos, is about 32 km from Limenas and is a place rich in both archaeological and natural beauty. Flanked by two natural bays, these spots served as harbours in ancient times. Much of the peninsula, especially its south-eastern edge, is characterized by ancient marble quarries that were in operation from antiquity all the way through the Byzantine era. The relentless quarrying has shaped the landscape, lowering much of it nearly to sea level. When the sea recedes, it reveals salt deposits on the quarry walls, which is how the area got its name, 'Alyki.' This name has been recorded since the late Byzantine period. Evidence of human activity in Alyki dates back to the 7th century BC. There's a cult cave in the eastern bay where you'll find the ruins of two ancient temples dedicated to an unknown deity. You can still see these temple remnants on the beach of the eastern bay. Additionally, there are the remains of two early Christian basilicas from the 5th and 6th centuries AD, which add to the archaeological intrigue. Interestingly, the quarries were abandoned during the Slavic invasions. Today, Alyki stands as a protected archaeological site, offering visitors a captivating blend of historical significance and stunning natural landscapes.