Maelstrom

Maelstrom, the undersea fortress of the Storm Giants from Storm King's Thunder. I built this to run Chapter 10 of this adventure and kept it as close to the source material as possible. I built most of the submersed areas on the same level so that you can play with the water level and have them submersed for you players, however, I also decorated them with fish so it's obvious if you want the better visibility. I've also added invisible cats in each room named for the section in the book to look for info on that room, super helpful.

This was a massive effort and I didn't decorate as nicely as I would have liked, feel free to build on top of it but it will let you plug and play this chapter without any issues.

Don't forget to scale medium/small creatures down to 0.5x0.5 and large creatures like giants to 1x1. The scale of the fortress was built from the perspective of giants and to keep all doors and such to that scale you have to mess with the tokens to match. Also you'll want to change the tile size in the Campaign & Board Settings to be 10 feet as well to make the measuring tool work accurately.