place name · a celestial or mythological pool or lake in the heavens

传说中西王母在天池宴请众仙。

place name · a natural lake situated high on a mountain, often used as a proper name for specific locations

长白山天池是一个非常著名的火山口湖。

place name · Lake Tianchi in Xinjiang

天池的景色非常迷人，吸引了许多游客。