One idea came to me last night…

I can't go to swim as often as I want. So I imagined a place, let's call it a house, looks like a swimming pool or like a small lake. It needs filling up the first floor with water and swiming on a boat between rooms. Instead of usual heavy furniture use inflatable table, bed, sofa, and so on….
The water must be warm enough to swim in any time. To add some buttons to turn on the water illumination and making waives.

You may hang up some nice bridges, to avoid being the sea seek when you are fed up with living on water. Build the walls with big windows and transparent ceiling like a one big window. And it would be great to open it in sunny hot days. And I would add some small islands with natural plants such as grass and flowers, or some small trees.

If think it up properly and have enough space such house could look like a paradise .... :)