Belarus–Ukraine border

Belarusian-Ukrainian border is the state border between Belarus and Ukraine with a length of about 1,084 km (674 mi). It starts from the triple junction with Poland to the west and stretches to the triple junction with Russia to the east. The tripoint border at the triple border junction of Belarus, Russia and Ukraine is marked in the form of a monument, while at the other border junction there is a river Western Bug that coincides with the border of Poland.

The border is situated in a geographic region of Polesia (Polesian Lowland) that stretches approximately from Western Bug to Dnieper along Prypiat River (just to the south of it). It is part of bigger East European Plain and known for its Pripet Marshes (or Pinsk Marshes).

The west end of the border starts at Western Bug around the area of lakes of Shatsk and runs eastward across the Pinsk Marshes. Further it stretches parallel to Pripyat River some distance south from it passing densely wooded areas that were contaminated after the Chernobyl disaster. The border passes Pripyat just to the north of Pripyat city and then also turns southeast as the river and continues to run parallel to it. As the border reaches Dnieper, it turns north towards Homiel and runs along the river. At the midpoint between Homiel and a town of Ripky, the border turns and again runs eastward towards Central Russian Upland for about 100 km (62 mi) where it terminates at triple junction point with Russian border.

...
Wikipedia