Котлин
Southern suburbs of the city feature former imperial residences, including Petergof, with majestic fountain cascades and parks, Tsarskoe Selo, with the baroque Catherine Palace and the neoclassical Alexander Palace, and Pavlovsk, which has a domed palace of Emperor Paul and one of Europe's largest English-style parks. Some other residences nearby and making part of the world heritage site, including a castle and park in Gatchina, actually belong to Leningrad Oblast rather than Saint Petersburg. Another notable suburb is Kronstadt with its 19th-century fortifications and naval monuments, occupying the Kotlin Island in the Gulf of Finland.