Lake Trasimeno has three characteristics islands, Isola Polvese, Isola Maggiore and Isola Minore.
The Isola Polvese, the largest of the three, is located in the southeastern part of the Trasimeno and it is a natural interest because therre are a tall holm oak (Evergreen Mediterranean Forest), an extensive cane and a centuries-old olive grove from which it extracts the organic olive oil.
The island has interesting architectural buildings that are the island's history namely the Church of San Secondo, the Olivetan Monastery, the Church of San Giuliano and the medieval Castle. Of great artistic interest, however, it's the pool of Porcinai - Garden of Aquatic Plants, created in 1960 by landscape architect Peter Porcinai, recovering an abandoned sandstone quarry.
The Perugia Environmental Experience Center offers a wide range of services, educational programs and school camps of varying lengths for schools and thematic tours for tourists on day visits and tastings.
The Isola Maggiore is divided into two parts in the west, stretching from the pier along Via Guglielmi, there is the built-up area while the rest of the island is made up of a dense network of paths lined with olive trees, holm oak, pine, cypress, poplar and other Mediterranean varieties.
The most significant architectural memories of the island are the Church of San Salvatore, the Church of San Michele Arcangelo (open), the Chapel of St. Francis with the bed in the Holy and the Windmill.
The Isola Minore is the smallest of the three existing in the lake Trasimeno and is the closest to Passignano. A single element is its shape as it looks like a comma.
It is currently uninhabited and uninhabitable because of private property