I actually have a back garden, but as it was a new built house you had to pay extra for them to lay a poor garden.
So I started laying some more paving stones, and then started laying the concrete foundations for a raised floorbed which would enclose my Garden Railway.
However a change of life priorities, etc. has put that on hold until the weather gets better, and despite finishing off 2 sides of my garden fence, the 3rd side has just had 2 panels blown out in the gales (I think my neighbours think it is my responsibilty but in fact it was actually poorly fitted by the previous owner). So something else to do when winter is over.
Whilst not up to date here is an idea of what lay ahead (most of the tall weeds have now been cropped).

I have sealed a large portion of my garage floor, but again I do not like leaving my nearly new car sitting out in the bad weather for long, so I've only had one run with a Hornby Rocket in there so far.