The noun 公园 (gōngyuán) means 'park,' referring to a public green space or recreational area. It is one of the most common words for describing outdoor public spaces in Chinese, such as 国家公园 (national park) or 城市公园 (city park).
周末我们一起去公园散步吧。
Zhōumò wǒmen yìqǐ qù gōngyuán sànbù ba.
Let's go for a walk in the park together this weekend.
这个公园里有一个很大的湖。
Zhège gōngyuán lǐ yǒu yí ge hěn dà de hú.
There is a very large lake in this park.
孩子们最喜欢去公园里的游乐场。
Háizimen zuì xǐhuān qù gōngyuán lǐ de yóulèchǎng.
Children love going to the playground in the park the most.