Houston "Art Wall" ... there are several notable murals in Downtown and Midtown

Houston Hip and Inspired Mural
on wall of Treebeards building at
corner of Travis Street ant Preston
Hotel Icon behind

New Michaelangelo-inspired creation 

mural on Fannin at Tuam in Midtown

La Creation mural in Midtown 

Older Midtown Eyeful Art "Love you" mural
[UPDATE: This mural no longer exists as the building was torn down
to make room for the new Midtown Superblock development] 

Buscuitpaintwall mural in Montrose (Lower Westheimer) at Mulberry St.
Note: Biscuit is the name of the home furnishings store

Nouveau Cafe mural in Midtown off Main