From another thread it appears there are a few Model Railroaders on here.
This is my 2nd layout, is approximately 16x18, but will grow to 22x28 in the near future as I'm finishing my basement and one whole side is dedicated to the trains. My kids love running them as I'm working on the layout. All started way back in 1978 when my Dad gave me my first set when I was 5 (I still have that set in running order)
Here are some overall pictures of the layout while being constructed. Maximum grade is 2.7% inside the helix which is used to climb from one level to another. Enjoy