Crescent Moon Village for me as well, though I always had a strong affinity for Hotel Horror, 40 Below Fridge and The Big Board as well.
Land 4 in general stands out for how much of it's own identity every level has, in theme, visuals, audio and how they play, makes it hard for me to rank them outside of a few select favorites, because even Hall of Hieroglyphs, despite just being the tutorial level, has a lot of charm of it's own.