A few years ago I had a water pipe into my house that burst. After I repaired it, I was left with a small drip that would have required much too much work to fix, so I left it. To my good fortune, my bees discovered it and, when the weather is hot and dry (that is most of the year), they do a good job of collecting the drops of water that form. Then the ground below barely gets wet. The drip is always there so my bees never forget about its existence....and I don't have to prepare a "watering hole" for them.