eromallagadnama:
Your first submission appears to be a little off color. I don't remember the concrete being that reddish. If available, you might walk back a tad bit and include less sky or make use of a wide angle lens to accomplish the same task.
The next time you're at the arch; walk underneath it; point the lens skyward and see what you can come up with. If you have a wide angle lens, it will make for a more interesting shot from this position.
All said and done, it is a nice composition, but why don't you try the same or similar shot early in the morning or at dusk. I think it would be more interesting.
The photograph of the man looking upward at the arch is quite interesting, but with a wide angle lens approach, he's is too far away and almost not noted.
The photograph of the lamp is rather interesting, but you might - the next time - move to the left and show some separation between the lamp post and the shadow area of the arch. Although a similar move to the right, might have proved interesting as well.
Oh by the way, where are your photographs of the garden? (Missouri Botanical Garden)
Hope this is useful.
Bill