Koryaksky volcano, andesitic cone seen from shoulder of Avacha volcano, Kamchatka, East Siberia, Russia

Koryaksky volcano seen beyond walkers on crater rim of Avacha volcano, Kamchatka, East Siberia, Russia

Hikers on rim of old crater, Avacha volcano, Kamchatka, East Siberia, Russia

Koryaksky volcano, 3456m high, conical andesite volcano, Kamchatka, East Siberia, Russia

Large monolith in the Avacha bay near Petropavlovsk-Kamchatsky, Kamchatka, Russia, Eurasia

Large monolith in the Avacha bay near Petropavlovsk-Kamchatsky, Kamchatka, Russia, Eurasia

Avacha volcano, lava plug formed in crater in 1991, Koryaksky volcano beyond, Kamchatka, East Siberia, Russia

The Avacha Bay near Petropavlovsk-Kamchatsky at sunset, Kamchatka, Russia, Eurasia

The Avacha Bay near Petropavlovsk-Kamchatsky, Kamchatka, Russia, Eurasia

Little tourist boat ships beside a large monolith in the Avacha Bay near Petropavlovsk-Kamchatsky, Kamchatka, Russia, Eurasia

Little tourist boat ships beside a large monolith in the Avacha Bay near Petropavlovsk-Kamchatsky, Kamchatka, Russia, Eurasia