An entry to the contest. The main big cave hasn't been changed much but one of the holes in the sides has been turned into a mysterious cave with glowing glowstone. some broken rails and a broken ladder lead to the cave. Inside lays a strange room.

p.s. Please look at this map in peaceful mode because if its not in peacefull a bit of the map will be destroyed by a whither (spoiler), also pls try and step on all the pressure plates (spoiler) to see what they do, also do not destroy any redstone although there isn't much and its hidden.