The name is slightly misleading since it's not an island at all, but it does lie on the opposite side of the Odra River from the Rynek. This is the spiritual heart of the city and where Wrocaw was founded around 1,000 years ago. Today, it's home to several churches, including the main Cathedral of St. John the Baptist, as well as the city's Botanical Gardens and a lovely clutch of timeless lanes and handsome buildings. Be sure to allow at least a couple hours to take it all in. The cathedral is worth a special look, with its 16th-century altarpiece, giant organ, and tower with gorgeous views over the city. The church dates from the middle of the 13th century but was nearly totally destroyed in World War II, and much of what you see today is a careful reconstruction of the original.