The Doulovo Municipality is located in the eastern part of the Danubian Plane and covers the northernmost part of the Loudogorie mountainous area. The municipality is in Silistra District and falls within the Northeastern Planning Region. Doulovo Municipality borders the following municipalities: Isperih, Kaolinovo, Tervel, Silistra, Glavinitsa, Sitovo and Alfatar. Doulovo Municipality is the second biggest municipality in Silistra District and 51st in size in the Republic of Bulgaria. The following historical sights exist in the Municipality: Medieval stone fortress Cartal Kale of 9th - 11th century; the historical locality Ayazmoto near Roujno village; settlement mound in Zhazhda park near Doulovo town.