Boris Gudenuf
Deity
Wish they did a little bit more...Even protecting against drought, Aquaducts are the biggest waste of space on the map if you're not Rome, Khmer, or now Inca.
This is why I've argued that Aqueducts should be a Linear Improvement like the Great Wall, but available to every Civ: one end has to be in a tile next to a City Center, the other end - any number of tiles away - at a 'water source' which could be a Mountain (stream), River, Lake, Oasis or now, Dam/Reservoir. Treat them like roads, so that other Improvements (but not Districts) could be built in the same tile, make them Pillagable, so that they could leave your city vulnerable to catastrophic water loss if not protected or immediately Repaired.
In addition, each tile the Aqueduct passes through could now be treated as a Water Source, so you could 'use' the aqueduct to provide extra Food per tile from Irrigation waters from the 'duct.
Providing Fresh, Clean Water should provide at least 1 Amenity to the city, or maybe 1 Amenity per X Population, in addition to the Housing from Water.
Saves us all a District spot on the map, makes Aqueducts either slightly more useful or absolutely indispensable depending on your city location - as they were and are in reality: Los Angeles would not exist today without Mulholland's water supply system, which is essentially a modern 'aqueduct' of artificial river channels