Kastro was established around the 14th century by the residents of Old Skiathos Town, in order to hide from the pirates that looted the island –and the entire Aegean. This small northern peninsula was like a natural fort. The castle was communicating with the main city via a wooden draw bridge. It was ruled by the Byzantines, up until 1453, by the Venetians up until 1538 and then by the Ottomans up to 1821. Today, it’s an impressive attraction. The remnants of the old buildings, the four remaining churches, a small part of the walls, a mosque, two water tanks and a big canon are there to remind us of the castle’s glorious past. 

It is located about 6 km north of Skiathos Town. Its construction started on 1794 and concluded on 1806. This is where the first flag of the Greek state was weaved and this is where prominent heroes of the Greek Revolution swore to liberate Greece from the Ottomans. This is a major attraction, especially during the Holy week of Easter and around the 15th of August. Access is easy via private cars, the local bus and taxis.  

Lake Strofilia is located on the southwestern part of the island, right behind the famous beach of Koukounaries. Many European environmental programs and official organizations protect this rare wetland as a place of grand ecological importance. The landscape is breathtaking and nature lovers will get the chance to see up close many weird species of flora and fauna.