Normally when you see these fountains (temizuya) outside of temples. People who are going into the temple will wash their hands prior to entering the temple.
So I asked John to demonstrate.
I know some people who would also drink from the fountain... I've not yet tried it.
We then saw a few beautiful wood buildings, and signs that said these were built in the late 1600s.
We finally found out we were at Kyomizukannodo temple... we just entered from its exit.