Minecraft: Towers of Wizardry adds a simple, but powerful mechanic into the Overworld of any world you use it with.

This pack adds nine massive indestructible towers that not only look cool, but serve as a vast teleportation network that covers a circle of 2000 blocks across.

There is first the Master's Tower: Over 250 blocks tall and always centered around (0,0), this gigantic edifice serves both as an easy-to-see structure and, more importantly, a hub which connects all other towers.

And there are eight Wizards' Towers: Over 85 blocks tall and centered around coordinates exactly 1000 blocks from the Master's Tower in all cardinal directions, these tall towers each have a gateway back to the Master's Tower as well as a Nether Portal and an End Portal within.

The Wizards' Towers form a perfect circle around the Master's Tower and, each is equidistant from its closest other towers. As stated, each is 1000 blocks (as the Phantom flies) from the Master's Tower.

As for their indestructibility and their location, it's best to say that the towers all always exist (more accurate than generate) at exactly the same coordinates exactly as they are. If one places a block within a Tower, it is immediately removed; if one removes a block from one of the towers, it is immediately replaced. This means one can't even ruin one's teleport network by accident :).

Enjoy!

---

P.S.: In a new world, the first time you ever teleport into a Wizard's Tower that just came into existence in the midst of a bunch of solid blocks, you might initially teleport in 1-2 floors down from the top floor with the gateway instead of right beside the gateway. But only once.