Spinalonga is a small island near Elounda in East Crete . It was an important Venetian fortress from 1903 became Leper . Spinalonga is known as the “Island of Lepers ” since there isolated lepers from Crete and the rest of Greece until 1957 . Spinalonga Today is the most visited archaeological site in Crete after Knossos . Every summer thousands of tourists visit the island by boat from Agios Nikolaos, Elounda and Plaka , for a tour of its dilapidated buildings archaeological endeavor to preserve . If you travel to Spinalonga will find guides who will offer their services to individual travelers against low price .