The one 10-15’ from hives remains unused. Gets sun. Easy to crawl in. Ignored.
The water source in a simple bird bath about 50’ away in largely shaded area is just so lovely to watch. Bees come and go all day. I have a nice movie off iPhone; no idea how to share.
Photo gives you idea how easy the water source solution can be. Two pools in the area. Bees never go there.
Both bird baths I add water to each 3-5 days. Each has 1/2 mosquito dunk in at all times. Rough edges = no drowned bees.
I got bees this Spring and provided water sources right away. No problems with neighbors.
((Photo on right full of bees; sorry if hard to see. They are lovely to watch.))