Avacha bay is a Pacific Ocean bay on the southeastern coast of the Kamchatka Peninsula. It is one of the largest in the world. Petropavlovsk-Kamchatsky, Yelizovo and Vilyuchinsk are situated on it's banks.

The bay is picturesque with rocks and hills surrounding it. Beautiful views to Koryaksky, Avachinsky and Vilyuchinsky volcanoes from the helicopter. At the entrance of the bay there is a natural monument — "Three brothers" rocks, which became a symbol of the bay and the city.