Cloud City from Star Wars Empire Strikes Back. Over 250 blocks high with over 280 block diameter. Default pack version is done in Iron Blocks. Planet Cube server model is done with Vanacia texture pack in vertical and horizontal steel blocks (diamond and lapis lazuli ore). Check here on Planet Cube's wiki for the Vanacia texture pack http://planetcube.site.nfoservers.com/pcwiki/index.php/Planet_Cube_Texture_Packs . the building will continue in the Vast on the Planet Cube server. (Correction: download is in Vanacia, the one on the server is being done in the Vast texture pack).

This project is currently being worked on in the Vast of the Planet Cube Server. Go to http://planetcube.net/pcwiki/index.php/Main_Page for details on how to download the modpack and Vanacia and Vast texture packs, then join as an apprentice. If you get accepted as a builder, then you can enter the Vast gate on the home world and fly out to -3700,+160 (I haven't put in the floating minecart system yet). I am currently reworking the entire station for the Vast texture pack and doing the interior from the bottom up (literally bedrock to ceiling). If you are willing and able you can help me with making buildings for the top deck and doing the interiors on the casino, hotel and leisure decks.

Added world download. Just Cloud City by itself.

Additional Notes

You need the latest unstable version of MCEdit in order to use the schematic file. Find the download for your OS here http://www.minecraftforum.net/topic/13807-mcedit-minecraft-world-editor-compatible-with-mc-beta-18/ or check my V'ger page for details.