Gaidaros or Fanari is a little island on the east of Syros, quite close to Ermoupoli. This isolated island is easily accessible by boat from Ermoupoli and many visitors choose to go for a swim on its famous beach Megali Agali, which hosts the oldest rotating beacon of the Aegean Sea built in 1834. The lighthouse is about 30 m. high and it gives a nostalgic note to this tranquil sandy beach with crystal clear waters.