this is a water Combat Arena i made (May or May Not Have been made before) i used a powerful mod called Single Player Commands W/ Worldedit tool to make this (I HIGHLY recommend this mod to anyone that builds LARGE structures commands i used were: //replace & //walls well this is kind of a safe combat arena (you need to remove iron doors and pressure plates for it to be a safe one) HIGHLY RECOMMENDED FOR VANILLA SMP SERVERS