[Pollard]

Yep, not a new design and it's all about the impact angle. 90 degrees or close to it is gonna splash. Slight angles won't. Simple stuff learned easily by washing a car, especially at a self serve car wash with pressure washer jet spray or actual pressure washer or rinsing dishes or.....

Meanwhile, an old design. They had these at the town fair where I grew up. Look only at the wall, even if talking, was instruction given by fathers.

[sasquatch]

Looks like the old Stanford stadium. Some places used to hang the daily newspaper on the wall for entertainment.

[woodbutcher1963]

Fenway Park?

That is what all the mens rooms looked like at Fenway until twenty years ago. Until is was finally remodeled.

I was in Sorrento, Italy and they had a trough carved out of solid stone. Literally, carved into the side of the cave/rock face. It probably drained into the Med.

[gnarledmaw]

The old bars around here tacked a piece of galvanized sheet to one of the walls. Usually with the pipe just under the right bottom corner and then they bent the left corner up and pulled a bit. You just found the right height and everything happened naturally like you were outside.