Where do you live?

There was a reasin for those tiles ... maybe they need new covers, but I bet they still drain.

I have always lived in Alabama. Misquitoes are always a problem, but they have just been horrible at this house. We couldn't figure out why they were so bad here. We have dunked everything possible, sprayed the yard, fogged - you name it, we've tried it. I really believe these weeping holes are the cause as I can't find any other sitting water.

I know the holes are meant to keep water away from the foundation and used to be tied into the city sewer system. This was phased out as it was too much of a burden on the water treatment plant. So I'm not sure where our pipes would drain to assuming they still work. Maybe we need to have them scoped or just leave them alone and suffer the mosquito bites. :(

Can you dig one out to see where it goes?

Put screen covers over them until you verify that they aren't needed. A plastic embroidery hoop with fiberglass window screening will do it while you figure out if they can be filled in without messing with your drainage.

Good idea about the screens! I will give it a try. The yard is far too big to dig them up. I may talk with a contractor to see what they think. I think the gutters directing the water away from the house is sufficient for protecting the foundation, but will check to make sure before doing anything permanent. Thanks!