59.2849°N, 116.5893°E.
The Patomskiy Crater (Fire Eagle's Nest) is a steep-walled mound of shattered limestone blocks rising 40 metres above the surrounding taiga in Bodaibinsky District, Irkutsk Oblast, eastern Siberia, in one of the most remote and lightly populated regions of the Russian Far North. The cone is roughly 160 metres across at the base and 80 metres across at the summit ring, with a ring-shaped crest, an inner depression several metres deep, and a small central hummock at the centre of that depression; the local Yakut population calls it the "Fire Eagle's Nest" (Гнездо огненного орла) and historically avoided it. It was first reported to formal science by the Soviet geologist Vadim Kolpakov in 1949 during a regional survey. Proposed origins include a near-surface uranium-bearing intrusion, a phreatic gas blowout, a cryovolcanic feature, and a low-velocity meteorite impact possibly associated with the 1908 Tunguska event further south; tree-ring work on the surrounding larch forest suggests the mound is on the order of 250 years old, which is anomalous for any of these explanations. The 2005 Russian expedition leader Yevgeny Vorobyev died of a heart attack on approach.
No core has yet penetrated to the base of the Patomskiy Crater.