Muramasa - loved the sylized look, which is where Wii thrives in graphics. Looks really pretty, especially on an HDTV, like a vibrant moving painting.

Mario Galaxy 2 - self explanatory

Xenoblade - Takes the opposite approach of Muramsa with a more realistic approach, but still works just as well. Very colorful and appealing to look at.

DKC on the sunset/sillouetted levels is also very impressive.

mario galaxy
metroid prime
sonic colours

Blimey, too many choices tbh, couldn't possibly narrow it down to just 3. Super Mario Galaxy 1 and 2, Cursed Mountain, Silent Hill Shattered Memories, Red Steel 2, Dead Space Extraction and Muramasa are all great looking.

Excitebots has some really beautiful environments, Cursed mountain is not on my top, Earth seeker has big environments ala Xenoblade, shame we will never see it over here.

1) Donkey Kong Country Returns
2) Super Mario Galaxy 2
3) Rayman Origins

Xenoblade Chronicles
Super Mario Galaxy 1+2
Monster Hunter Tri

The Galaxy games looked absolutely FABULOUS.
Also, Xenoblade.
And Okami, even though it was a PS2 port, lol.
And don't forget Endless Ocean 2.

Cursed Mountain? Really?

I mean, to each their own and everything, but I just can't see how that ranks as one of the Wii's top lookers. It looks like a PS2 game.

its draw distance was quite impressive actually, when you are halfway through the game you can look back and see all the portions of the mountain you already covered. everything else looks just like a ps2 game unfortunately.

hugely underrated game BTW.

Xenoblade has some nice artistic design but graphically it was atrocious. The textures were all low res and they 2 have digit hands. If the last story did no more than one thing better than Xenoblade, it was definitely graphics.

The top 3.
Mario Galaxy 2
Zangeki no Reginleiv
Monster Hunter Tri