Hello there, this is my Project "Dark Tower". It's my first real building and I've spent the last few days to complete it.
It's not just the tower, there is also a small castle and a little outpost. I tried to keep it low fantasy, but there is also a bit high fantasy. And there are also a few secrets to discover (especially in the foundation ;) ).
It was built in minecraft 1.14.2, and I wouldn't recommend playing it in another version of the game.

(And by the way, I wouldn't play it in survival, the stairs are very dangerous).
Anyway, have fun exploring the tower and castle!