Magnuz Binder has created several very interesting regions. Here is a g+ post with short videos of many of them;
https://plus.google.com/115311229738787 ... CkQmYcFJaf
This particular region holds a large globe of the Earth created with sculpted prims and in exacting detail. Here is the video explaining it;
You might wish to make sure you have some time to visit some of the other regions while there.
HG @ hypergrid.org:8002:Earth
http://minethere.blogspot.com/2013/04/m ... -grid.html