The Groene Hart (Dutch pronunciation: [ˈɣrunə ˈɦɑrt]; "Green Heart") is a relatively thinly populated area of the Netherlands consisting of pastures and peatlands, covering much of the middle portion of the Randstad megalopolis. The major Dutch cities of Rotterdam, The Hague, Leiden, Haarlem, Amsterdam, and Utrecht surround this area. Cities inside the Groene Hart include Zoetermeer, Alphen aan den Rijn, Gouda, Woerden, and the smaller cities of Schoonhoven, Oudewater, Haastrecht, Nieuwkoop, Montfoort, Waddinxveen, Bodegraven, Vianen and Boskoop.