Kamchatka sits on the 'Ring of Fire', a loop around the Pacific Ocean where many of the world's most active volcanoes and earthquakes occur. The biggest volcano, Klyuchevskaya Sopka, is nearly 5,000 metres tall and erupts quite often, sometimes sending clouds of ash and glowing rocks into the sky. Seeing a volcano erupt is exciting and spectacular - scientists study Kamchatka carefully to better understand how volcanoes work.
The Valley of Geysers was only discovered in 1941. Geysers are jets of boiling water that shoot up through cracks in the ground, heated by hot rocks underground. The biggest geyser in the valley, called Velikan (which means 'Giant'), shoots water 30 metres into the air every few hours, filling the valley with steam and rainbow mist. The ground around the geysers is bright orange and yellow because of the minerals in the water.
Despite being so wild and remote, Kamchatka is full of animals. Brown bears catch salmon in the rivers during summer - at some rivers there are so many bears fishing that you can watch dozens of them at once. Steller's sea eagles, one of the biggest eagles in the world, nest on the rocky cliffs. Whales and sea otters swim just off the coastline. Very few people live here, so the wildlife has plenty of space.