The Uzon Caldera is a result of large explosive eruptions about 40'000 years ago. The caldera is situated at the west and alongside the neighbouring Geysernaia caldera. The Uzon–Geysernaia twin Calderas form a 9 x 18 km depression.
Within the caldera there is a large geothermal field, numerous hot and cold lakes. There is a present geothermal activity concentrated in a small zone filled with boiling springs, gas-steam jets, mudpots, small mud volcanoes, hot lakes and springs.
At the eastern margin of the Uzon–Geysernaia twin Calderas is located a 4 kilometres long canyon of the Valley of Geysers.
Russia, 2002 Uzon Caldera.
The stamp was issued in the series "Unesco Heritage Sites — Kamchatka".
Palau 2014, Uzon Caldera.
The stamp was issued in the series "Russia – Sites and Scenes".