This one?
Sounds like a fountain mentioned by Massie's Nicholas and Alexandra to be in Stavka.
Part 3, chapter 21, page 302:
"After lunch, the games often continued in the garden: "He dragged some of us off after lunch in the tent to a round fountain in the garden which had porpoise heads all round it, with two holes in each to represent the eyes. The game is to plug up these holes with one's fingers, then turn on the fountain full split and suddenly let go. The result was that I nearly drowned the Emperor and his son and they returned the compliment, and we all had to go back and change, laughing till we nearly cried." Nicholas, expecting that the Empress might disapprove of such rough games, wrote an explanatory note: "I am writing...having come in from the garden with wet sleeves and boots as Alexei has sprayed us at the fountain. It is his favorite game... peals of laughter ring out. I keep an eye in order to see that things do not go to far.""
Sound like it? I hope I was able to help!
