The Island, a pearl on the Danube, in between the northern part of Buda and Pest, was named after Princess Margaret, who lived here in a convent in the 13th century. The two-and-a-half kilometer long island has been inhabited from the 12th century, when Dominicans and Franciscans established monasteries on its land. During the second part of the 18th century, it was turned a summer resort for aristocrats, and later for the upper middle-class. The island is rich in natural thermal springs, which are used in medicinal thermal baths. Additional tourist attractions include fine restaurants, well kept parks, and open-air theatres, staging concerts and plays during the summer months. The island, except for the most northern part, by the hotels, is closed for city traffic. One bus line provides public transportation, but most people walk, run, bicycle, or choose to rent a special and fun way of getting around on the island: bringohinto - a four wheel bicycle.