A wooded and moor region of around 2k squared, yet keeping to a memory small size. (http://www.sooden.co.uk/Wooded_Moor/)
Uses direct to terrain placement (e.g you can place items right on the ground, no need for a room/house). Experience of placing items in avatar view is recommended.
There are flat areas scattered around the map, to allow easy placement of objects, but you can place objects anywhere, with a bit of skill and rotation :)
Keep it small with a free land allowance, or for subscribers (Sinespace paid subscription level), you can explore the map and start filling out your new lands.
(Region has bounding boxes around the edges, so you will hit an invisible wall when you are getting close to the edge)