The World of Trees. I made the core world by hand using MCPaint. We have hosted this on our private creative server for quite some time now. Lots of people have added on.

My brother and our friends are slowly building a medieval city sprawling outward from the original spawn point.

We did play this as survival for a while back when it was first hosted but the world was too devoid of iron to really have a good time. Now we have a railway going into the naturally rendered survival areas and all is well.

A really awesome house which is huge. This world also has a small little town with a police station, a post office, a catholic church and a little milk bar. This map truly is awesome!

This is a very small view of 2 small buildings on the server... join to see the full map... in all of its glory.

http://www.minecraftforum.net/viewtopic.php?f=1025

Ive been working on this world for a few months. Theres heaps to explore, including towns and massive caves. Try to guess which tower is in the screenshot (hint: its Australian).

I've been building this house for a while! I have working redstone lamps. I will upload 1 more later if i get more then 5-10 dowloads (I will upload my real house in Minecraft) cuz i'm soon finished with it! :D