tarichkov Island is a natural monument</strong> island located outside of Avacha Bay, which is the biggest bay in the world. It is 24 km long and 3 km wide (at the mouth), with a maximum depth of 26 m. A lot of birds make their nesting colony on this island, for ex. Tufted Puffins, Ancient Murrelets, Thick-billed Murres etc.