A true work of Art! Traditional Cache

I have been noticing a lot more beautiful things in the area since taking a different job a few months ago and I thought this would be a great place for a cache so it would get some more visitors! Please take the time to enjoy the beautiful works of art here and the mural along the side the building! This is a nano cache with a twist! Most will figure it out quicker than others so I’m rating it a 3.5 difficulty! Please give me some feed back and I can adjust it if necessary! This cache is placed on public property so no permission was needed to place it! Please be respectful of the artwork! It’s not the reflectors so don’t pull them off! Cache is tricky though so I’m providing a hint to help narrow down the area to one specific work of art! Thanks and enjoy the hunt! Use stealth please!