I thought I would share my building as it was a good learning experience for me. I decided to build a skyscraper and based it loosely on the Burj Khalifa:
http://en.wikipedia.org/wiki/Burj_Khalifa
Unfortunately I was well aware of the height restrictions, so I used the design and made it into a more chubby... flatter building. It was my first time using commands on the server like copy and paste and I felt I got better at building as a result.
Below is the building located in World [Builder 151]. It is in one of the corners of the map. Please feel free to visit it and travel inside and up to the top. I like all my builds to allow people to go in all parts of them so there are stairs and elevators in the building, you need to just use the stairs only closer to the top.
Outside:
Above: