Biodomes

So, the original idea was to create a bubble of habitable space underwater, once I was done I started thinking about some more things to add, then some more. Leave any suggestions on what I should add next in the comments.
This currently features:
- The biodome
- A small farm
- A small minecart station with a connection to the mainland
- A dock with a boat dispenser
- A small house under the biodome
- A hidden mine under the biodome, which can be used as you wish, because only the start has been made