Patomskiy crater
The Patomskiy crater or Patom crater (Russian: Патомский кратер, Patomskiy Krater), also known as Конус Колпакова, Konus Kolpakova "Kolpakov cone") is a peculiar rock formation located in the Bodaibo District of the Irkutsk region of southeastern Siberia, 360 kilometres (220 mi) from the district center Bodaibo. It is a large mound made of shattered limestone blocks on the slopes of the Patom Highlands in an area of dense taiga.