The “Technic Tower” is a giant tower with much detail and modern build style.
You can use it for your Adventure maps, Servers, etc. for free (you don’t have to announce me somewhere either).
Important: It only looks good in Minecraft 1.9 (since the apperance of iron bars changed). If you want to use this building in a Minecraft 1.8-Version you have to turn it into a schematic using MCEdit.
For Minecraft 1.9