Siena takes great pride in its fountains.
The city has no river through way (unlike Florence or Rome)
and providing reliable fresh water was always a challenge throughout its history.
These are contrada fountains-- eagle and tortoise.
They are perfectly safe to drink.
I am delighted, as I usually carry a water bottle with me,
and was imagining I would have to fill it up at the hotel tap
(safe though usually not marvelous in flavor)
and this is much better.