This is the indoor pool at Heast Castle. The tile work was amazing. There was so much attention paid to the details at this place. If you are in the area, it's definitely worth a visit. We only saw 1/4 of the castle.
@moreyoulessme No one is allowed to get in this pool, hence the water is perfectly still. It's just so dark in there, that it was a challenge. I SO wanted to take a dip :)