This is a tower I made a while back. It's called the liquid tower as water and lava are the main features of this tower(Naming is not one of my skills). The main light sources for the whole thing are the lava pillars while the water is only for decoration and for jumping into in case one accidentally touches the lava. At the top of the tower, is a sphere containing mostly water with a hollow glowstone sphere at the center. As a result of my lack of skill for interior design, every floor looks almost exactly the same. Feel free to fill them yourself.

Credit to TaviRider for the double doors with disable switch used as the entrance.

The MCEdit schematic contains only the tower and the double door mechanism. Not the island.