We have one on the fifth hole on our golf course by the creeks junction.
The "bowl" is an old tin upside down garbage can with a car tyre base.
It also has a resident Huntsman in the bowl to add a bit of excitement to those who find the urge to sit.
It has no front door, just an open eye view of the two creeks.
Mind you, we are fairly upper class, it does have carpet.
I always check it fully before use, there are plenty of snakes in that area.