Nice castle on a hill above the town. It gives great views of the island. It takes about 1-2 hours to see it, considering that you will also see the monastery of Saint George right beneath the castle. The entrance door is large and impressive and has a carved marble lion on it. It is amazing how many castles there are in Greece, isn't it? And most of them are so well-constructed that they have survived time very well. Inside the Castle of Skyros there are some ancient remains, which means that an ancient town used to be there.