Here's a shot I just took outside my spawn base. Granted it might not look that impressive at the moment, but I have big plans. Inside the first wall there is a garden with plenty of trees and crops. Inside the second wall there are a few entrances to my mines that are close to my spawn, as well as bridges that lead to my mines that are further away. Eventually there will be minecart tracks connecting it all.
Here's a skeleton burning in hell... I mean my 15x15 shaft. Also note the progress... she's getting deep.