I've seen a few people showing how to make a TNT cannon on Youtube, but never uploaded here or anything like this. This Fortress is constructed of Bedrock, Contains 6 TNT cannons fired from one button, 2 Observation areas, Lava pool in the front to deter entrance, Lever controlled Iron doors on the 2 entrances, and a storage area for extra TNT and red stone, as well as a water control switch to stop the flow of water down the barrels until loaded for faster loading. This defensive platform would be a great addition to a Faction base or Pvp server or just to mess around with. I suggest staffing it with at least 2 people (gunner and re-loader) as well as 1 or 2 guards simply because while its not easy to get into if closed, it is possible. I tested it alone and got roughly 36 shots a minute.

Additional Notes

This Cannon along with the barrel design were made for ease of use and accuracy. With other designs i saw it wasn't assured the TNT would follow the same flight path with each launch, with this design i tested it several times and as long as you place the same amount of charges into the barrels there is a very high chance of consistent impact zones.

Please leave a comment if you liked this idea, have any suggestions to improve it, or want another one.