Park
Noun
こうえん
この通りを真っ直ぐ行くと、公園があります。
If you go straight down this road, there’s a park.
公園ですなあそびをしていたら、手が真っ黒になってしまった。
I was playing with sand at a public park and it turned my hands as black as coal.
「フグと一緒にいった公園、どうだった？」「正直今までに行った公園の中で一番楽しかったよ。」
"So, how was the park you and Fugu went to?" "That was actually the most enjoyable park we’ve ever been to."
A public park is a park that is public. It's a public park.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.