While we did not stop here to swim, it is worth a 15 minute stop to just see this interesting pool built in an old rock quarry. There is a $1 fee/person just to walk through the facility, but there is enough access to see most of the pool and surrounding area from a couple of balconies without paying a fee. It appears that it would be a nice place to spend the day swimming and laying out in the sun. In any case, if you are in the area it is worth the time to stop by just to see it for 15 minutes.
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