Patomsky Crater

The Patomsky Crater is a cone-shaped mound of shattered grey limestone in the remote taiga of the Bodaybo District, Irkutsk Oblast, roughly 360 kilometres from the nearest town. Discovered in 1949 by the geologist Vadim Kolpakov, it rises about 40 metres, spans some 80 metres across, and has a raised rim enclosing a central hillock. Its origin remains debated among scientists, with hypotheses ranging from a meteorite impact to gas explosions or deep endogenous geological processes; studies of tree rings around the structure suggest it formed within the last few centuries.

The Evenki people of the region are said to have long avoided the place, and local names translate loosely as the "Fire Eagle Nest." Its isolation, unusual shape and unexplained origin have attracted stories of meteor falls, UFOs and ill fortune, including the death of an expedition leader travelling to the site in 2005. These accounts are anecdotal and part of the folklore that has grown around a genuinely puzzling landform.

Stripped of speculation, the crater is a rare and scientifically intriguing geological feature whose formation is still not fully understood. It remains a subject of research interest and a compelling example of how remote landscapes accumulate both data and legend.

The crater lies deep in roadless Siberian taiga and is among the most difficult sites on this list to reach, typically requiring a helicopter charter or a lengthy, arduous overland expedition through boggy forest. There is no infrastructure of any kind, and the climate is severe for much of the year.

Visits are effectively expedition-level undertakings suited to well-equipped, experienced travellers. Anyone attempting the journey should plan thoroughly for self-sufficiency, weather and emergencies, and treat the fragile landform and the region's indigenous heritage with respect.