Thank youKrazy Kremland in Donkey Kong Country 2. It is an evil amusement park build on a swamp infested with giant bee hives.
Beppi the Clown of Cuphead is top-tier level.
Not exactly a "level" or "zone" but the fight is funfair themed and BOY what a fight the clown pulls.
Amusement Park in Nier: Automata
Fantastic music, and I love the setting.
Just perfect aesthetically, and the boss, the boss is amazing shit.
Oh man I haven't thought about that game for so long but I loved playing that at the local arcade when I was a kid.