Petropavlovsk Kamchatsky is the most important city of Kamchatka Peninsula with 198,028 innhabitants. Koryaksky and Avachinsky volcanoes are visible from Petropavlovsk.
Browsing photos of Kamchatka is an exciting adventure. I just found a Geothermal Power Plant, amazing clouds over the volcanoes, crater lakes, impressive cliffs and beautiful meadows. This is my favourite photo from Kamchatka. More interesting photos at "popular tab" of Kamchatka's map.