Lake Zaysan or Zaisan, also known by other names in other languages, is a freshwater lake in Tarbagatay District, East Kazakhstan Region, Kazakhstan. It is the largest lake in the region. The lake is generally frozen from the beginning of November to the end of April, but still has an abundance of fish.

The Balkhash-Alakol Basin or Balkhash-Alakol Depression(Kazakh: Балқаш-Алакөл ойысы; Russian: Балхаш-Алакольская котловина), is a flat structural basin in southeastern Kazakhstan.