Tidied up this piece, added some actual sense of design to the architecture.
Description as before:
The Empress’ castle is built on an island in the middle of a
waterfall, from the level of the waterfall it’s a series of canals going
to a small tower, from below it’s a huge complex with small harbour at
the bottom.
The whole complex is powered by giant waterwheels fixed to the side and powered by the waterfalls.