: One of the largest in the world ( 1.3.1 ).

The nature of Russia changes from north to south in distinct zones ( 1.2.4 ):

: The Volga is the longest river in Europe (1.5.1). Other great rivers include the Ob, Yenisei, and Lena (1.5.5).

Most of Russia is covered by vast plains ( 1.3.6 ):