Sand castle

Here we have a excellent sand castle and guess who built
It, me, my 2 uncles Troy and Travis then Luis my brother helped to.
Now I'm thinking that this took about 2 hours to build. You are now
thinking, " Why did it take so long?" it took so long because we made
fortress river, castle lake, corpse creek and survivor swamp. And the
castle is called crystal castle. So that's my sand creation.