LogFAQs > #972779427

https://www.youtube.com/watch?v=fXJQ4z6AouQ

The list only includes the main platforming series (Yoshi's Island is considered a Yoshi game by them, not a Mario game).

It's a decent list, all things considered (although it feels kinda inconsistent with sometimes naming singular levels and sometimes naming entire worlds). I don't think any of their choices are bad, at least (except maybe Bianco Hills. There are probably 3, maybe 4, Sunshine worlds better than that one). I'd have included a full blown 64 world (although Bowser in the Sky is probably the best final level in a Mario game) and Grandmaster Galaxy from Galaxy 2 (a better version of Darker Side of the Moon).

I figured it's a decent time for a Mario level discussion in the wake of the movie, and this video felt like a good launching point for it.