Belsaria is the City of Fountains. The capital of Nowheria, it's truly a civic marvel, due to the thousands of fountains that jet water into the air at every intersection and in the courtyards of almost all the houses.
Built at a similar time to Rome, the architects of Belsaria were masters of aqueducts, reservoirs and canals, innately understanding the flow of water, and the masonry techniques and materials needed to direct and control it.
What I need to know is where Belsaria needs to be located, how much water pressure might be needed to support a series of impressive gravity fed fountains, and what kind of geographical features might be required to allow for a city covered in such beautiful and wondrous items.
Edit for clarity: I'm trying to maximise the number of fountains that it's possible to have per square mile in the city. Geographical features (even extreme ones) that help with this are welcome suggestions)