From the Wikipedia page [1]
Zapadnodvinsky District (Russian: Западнодви́нский райо́н) is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the west of the oblast and borders with Toropetsky District in the north, Andreapolsky District in the northeast, Nelidovsky District in the east, Zharkovsky District in the southeast, Velizhsky District of Smolensk Oblast in the south, and with Kunyinsky District of Pskov Oblast in the west. The area of the district is 2,816 square kilometers (1,087 sq mi). Its administrative center is the town of Zapadnaya Dvina