Some of the best sketches you will ever see...

[toxicvoxel]

http://www.flickr.com/photos/luis_ruiz/

[Rich O Brien]

Beautiful watercolors. Thanks for sharing.

He's blog gives more info behind each painting and worth reading.

http://www.luisrpadron.blogspot.com/

[Dave R]

Thank you for that link. I've been following these guys on Flickr for awhile.

Flaf, Gerard Michel and Sketchy-G.