former lake in the southern Ural mountains in Russia, used as a disposal site for high-radioactive waste
via Wikipedia infobox
Lake Karachay (Russian: Карача́й), sometimes spelled Karachai or Karachaj, was a small lake in the southern Ural Mountains in central Russia. Starting in 1951, the Soviet Union used Karachay as a dumping site for radioactive waste from Mayak, the nearby nuclear waste storage and reprocessing facility, located near the town of Ozyorsk (then called Chelyabinsk-40). Today the lake is completely infilled, acting as "a near-surface permanent and dry nuclear waste storage facility." Its radioactivity is comparable to the Chernobyl disaster.
Satellite image/map of Lake Karachay
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).