1) See The Smiths playing live (at the time of writing, as far as I know, none of the band is actually dead, but a reunion seems very, very unlikely).
2) Stand on the observation deck of the World Trade Center. Pretty damn sure about this one.
3) Tell people I live in the County of Avon. Gone and never missed.
4) Stand right outside 10 Downing Street as a tourist. Vaguely remember doing this as a small child.
5) Touch the stones at Stonehenge.
6) Get off a tube train at Strand Station
7) Go to Beijing. Okay, I know Beijing still exists and this is technically possible, but I went there and I didn’t like it and I won’t be going back.
Pretty sure my children will never do 1-6 either.