Wells ?

[gandalf]

Are there any more wells than the one next to the starter area (Longkeep) ? Water is needed in so much,

[Zapp]

you can build wells later

[Kai]

You can find them in some villages or ruins, but otherwise water is randomly dropped from objects and enemies.
You can find a bunch in the Spires for those puzzle rooms, those pots drops items, and those horizontal 'canisters' tends to hold items and water.

It's a good way to get high level goods out of the region too if you unlock the later spires and want some easy bronze or iron ingots.

You can technically beat the game without needing to produce materials to craft in base, if you know how to source them from enemy and object drops.

Simply sneaking into end game regions as a Level 1 player and breaking some pots can skip entire tech trees.

[Keldrath]

You unlock them as a crafting recipe around when you start getting to the third major area.