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Kantubek (Russian: Кантубек; Karakalpak: Qantubek) is a ghost town on Vozrozhdeniya Island in the Aral Sea. The town is still found on maps but was abandoned in 1992 following the dissolution of the Soviet Union. It is currently uninhabited and lying in ruins. Kantubek used to have a population of approximately 1,500 and housed scientists and employees of the Soviet Union's top-secret Aralsk-7 biological weapons research and test site.
Brian Hayes, a biochemical engineer with the United States Defense Threat Reduction Agency, led an expedition in the spring and summer of 2002 to neutralize what was believed to be the world's largest anthrax dumping grounds. His team of 113 people neutralized between 100 and 200 tonnes of anthrax over a three-month period. The cost of the cleanup operation was approximately US$5 million.
- Gorvett, Zaria (28 September 2017). "The deadly germ warfare island abandoned by the Soviets". BBC. Retrieved 17 September 2020.
- Pala, Christopher (12 January 2003). "Anthrax Island". The New York Times. Retrieved 17 September 2020.
- Pala, Christopher (22 March 2003). "Anthrax buried for good". The Washington Times. Retrieved 26 August 2020.