The Domtower from Utrecht (highest church tower in The Netherlands) built in survival mode on the factions server of BlueTorch*. The tower is even higher then the real tower in Utrecht which reaches 112 meters. My copy of this tower is 152 meters high. It took me about 15 hours to build this, excluding the time getting all the recourses (about 50 stacks granite, 30 stacks hardened clay, 40 stacks cobblestone, 20 stacks stone bricks and a lot of other materials).

*Bluetorch IP: mc.bluetor.ch Site: Bluetor.ch