Klyuchevskaya Sopka is a stratovolcano, the highest mountain on the Kamchatka Peninsula of Russia and the highest active volcano of Eurasia. Its steep, symmetrical cone towers about 100 kilometers from the Bering Sea.
The first ascent of the peak was in 1788 by Daniel Guass and two other members of the Billings Expedition. The second ascent was not until 1931 though: 143 years later, and quite tragic. Several of the members of this very expedition were killed by flying lava bombs on the descent of the peak.