Super Mario World - Bowser's Hideout is one of those classic SNES levels that sticks with you. You start off in this eerie, lava-filled fortress with those creepy Boo Buddies floating around, and the music just nails that "final showdown" vibe. The platforming gets tricky—lots of disappearing blocks and fire bars to dodge—but it never feels unfair. And that final fight with Bowser? Still holds up. You gotta knock him off his clown car while dodging fireballs, and man, that first time you beat him is pure satisfaction.

Also, secret exits everywhere if you know where to look. I spent way too long as a kid trying to find them all.