If it were us in our current situation, I'd spend it on the landscaping, pay off the last of our personal loan and credit cards, and put any remaining on the mortgage. In our situation, paying off those last debts would free up a huge amount to pay extra on the mortgage, and while the idea of reducing the mortgage quickly is lovely, I currently have a crappy backyard and really want it sorted. We don't have an offest account so it wouldn't be an option for us, and we have a fixed rate for another 18 months so while we can pay extra on the mortgage we can't pay that much extra. I'd rather improve our standard of living now and set us up to smash the mortgage in a little while.
But obviously that is very specific to my situation