 The largest lakes in Croatia proper are Lake Dubrava and Lake Varaždin reservoirs, both near Varaždin, through which the Drava River flows.Croatia proper has a wealth of wetlands.Two out of the four Croatian wetlands included in the Ramsar list of internationally important wetlands are located in the region—Lonjsko Polje along the Sava and Lonja rivers near Sisak, and Crna Mlaka near Jastrebarsko.