The largest city built on solid permafrost
Yakutsk, Russia
Home to over 350,000 people, Yakutsk stands on ground frozen year-round to hundreds of meters deep, forcing every building to sit on stilts.
Yakutsk is the capital of the Sakha Republic in Russia's Far East and the largest city in the world built entirely on continuous permafrost, ground that remains frozen year-round to depths of hundreds of meters. Founded in 1632 as a Cossack fort, it has grown into a modern city of over 350,000 people despite average annual temperatures around minus 8 degrees Celsius and winter lows that have reached minus 64 degrees Celsius. Because the permafrost beneath the city would destabilize and buildings would sink if heated directly, nearly all structures are raised on concrete piles driven deep into the frozen ground, leaving a gap that allows cold air to circulate beneath foundations and keep the permafrost stable. Yakutsk's economy relies heavily on diamond, gold, and coal mining, resources abundant across the Sakha Republic. The city also hosts a permafrost research institute and an underground laboratory carved directly into the frozen ground, used to study how climate change is affecting the vast frozen landscape surrounding the city.
A Fortress Turned Frozen Metropolis
Yakutsk was founded by Russian Cossacks in 1632 as a fort along the Lena River, serving as a base for further exploration and fur trade expansion into Siberia's Far East. It grew slowly for centuries before Soviet-era industrialization and mineral extraction accelerated its growth into the region's dominant urban center.
Engineering Against the Permafrost
Because Yakutsk sits atop continuous permafrost reaching hundreds of meters deep, engineers cannot simply pour foundations directly onto the ground, as heat from buildings would thaw the permafrost and cause catastrophic sinking. Instead, virtually every building rests on deep concrete piles with an insulating air gap beneath, a construction method essential to the city's survival.
Extreme Seasonal Swings
Yakutsk experiences one of the most extreme seasonal temperature ranges of any major city, with winter lows reaching minus 64 degrees Celsius and summer highs occasionally exceeding 30 degrees Celsius. Residents adapt with heavy insulation, district heating systems, and vehicles specially modified to start in extreme cold.
A Hub for Permafrost Science
The city hosts the Melnikov Permafrost Institute, along with an underground laboratory carved directly into frozen ground that maintains a stable natural temperature year-round for scientific study. Researchers there monitor how warming Arctic temperatures are gradually destabilizing permafrost, a phenomenon with major implications for infrastructure and global carbon release.
Fun facts
- Yakutsk is widely cited as the largest city in the world built entirely on continuous permafrost.
- Nearly all buildings in Yakutsk stand on concrete piles to prevent heat from thawing the permafrost beneath them.
- The city has recorded winter temperatures as low as minus 64 degrees Celsius.
- Yakutsk hosts an underground permafrost laboratory carved directly into naturally frozen ground.
- The Sakha Republic surrounding Yakutsk produces a large share of Russia's diamonds.
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Text on this page is original Terralocate editorial. Background facts compiled from the public sources listed above. Images via Wikimedia Commons under their respective licenses (typically CC BY-SA or public domain).