http://maps-of-bangladesh.blogspot.c...anges-and.html

Like the others have said, it's all about scale. The map at the link above shows the Brahmaputra river, which flows through India and Bangladesh, and has some of the largest river islands in the world. The largest river island in the world (Majuli) is actually that river as well (163 sq mi) - you can spot it just above the 'R' in Brahmaputra River.