A few nice Colorado Denver images I found:

Push Pins
Colorado Denver
Image by mclcbooks
Parking Lot Attendant: "You can’t take pictures here."

Me: "Why not?"

Parking Lot Attendant, removing coat to reveal a badge: "Because I’m security!"

Me (in my head): "But ‘because I’m security’ doesn’t answer the question ‘why not?’ and besides, this is a public sidewalk, so I can take pictures here" – but actually, I said, "OK."

After considering the option of continuing to take pictures, or perhaps take his picture, I walked around the corner and shot the same building from a different angle (see the first comment box below).

The Nature of Horses 1
Colorado Denver
Image by bigvern
Deborah Butterfield: The Nature of Horses – Denver Botanic Gardens