Gachedili Canyon Natural Monument (Georgian: მარტვილის კანიონი) also known as Abasha Canyon Natural Monument (Georgian: აბაშის კანიონის ბუნების ძეგლი) and Martvili Canyon (Georgian: მარტვილის კანიონი) is an Abasha river erosion canyon located in Samegrelo region of Western Georgia in Martvili Municipality near Gachedili village, 240 meters above sea level. The water in the Abasha river has deep green color in the canyon. The Gachedili Canyon Natural Monument is located 6 km from the popular Balda Canyon Natural Monument. A canyon visitor center is located in the village Great Inchkhuri on the northern outskirts of the Martvili.

The lower part of the Canyon is rich in trout and other species of fish. Amphibians and reptiles include European green toad (Bufotes viridis), hylidae, dice snake (Natrix tessellata). There are also birds of prey and several species of bats.