The third largest Greek island is Lesvos. Olive groves that go on forever, thick pine forests, sandy beaches, monasteries, pretty traditional houses and old mansions. The truly ancient history of the island is visible everywhere on Lesvos. Starting out from the capital Mitilini, which is built on top of the ruins of the old town, one begins to get acquainted with the unending beauties of the island. Northeast of town is the Roman aqueduct, further north Pirgi Thermis with traditional old houses, and the Loutra Thermon. Scenic seaside villages with wonderful beaches, like Plomari, known for its ouzo, are everywhere. The mountain village of Agiassos, on the foothills of Mt. Olympus, has charming houses and little streets. Sandy beaches at Vatera, Kaloni, Mithimna, and famous Molivos; a picturesque place with special colour, a long tradition in folk art, intense night life in the summer, it is a meeting point for artists. A Byzantine castle looks down on the village and the lacy beaches of Eftalous to the north and Petra to the south. The sights continue to be impressive, from the fossil forest at Sigri to the antiquities at Eressos.