Minecraft replication of New York City (work in progress, participate at https://buildtheearth.net/teams/nyc):
In this project we build New York City in Minecraft at a 1:1 scale. Everyone can help building in this project on our server which provides the simplest build system available. With 8000 active members and over 25,000 buildings our team focuses on building as much as possible of this city. The system is fully automated, everyone can help building without any application system and without having to install any mods.