Normally, when you look at a radar you're looking at precipitation whether that's rain, snow, or hail. Something really interesting though happens when you get near many big cities, you can see more than the weather, in fact, you can actually see buildings show up on radar!
That's right! Buildings! How can this be though? Many cities have radars for their airports that are normally placed closer to downtowns and scan lower in the atmosphere than most of the NWS radars. This results in a radar beam that is low enough to bounce off of tall skyscrapers creating what looks like rain but is actually the skyline being picked up!
So, what does this actually look like on radar? Well here are some examples from across the country!
Some of the best Examples are Chicago and Atlanta:
Many other cities show up as well though!