Well, I'm not sure that's a clock (the first digit would be missing - how would it show 12), but it sure looks like one to me.
The reflection (if you look at it for a second) you'll notice, ends in a wave. So it's not a well polished floor, it's liquid (probably water).
Reflecting Pool!!! That's it! It's the reflecting pool in Oklahoma City (but the gate color should be grey not yellow...).
And
HERE it is!