Was going to wait until the summer, but it's been so cold this year, I'm pretty much restricted to the computer with my severe ME/CFS, therefore here's the Lost City one done already:-

https://www.youtube.com/watch?v=WaWwWO8z1Ms
https://www.youtube.com/watch?v=RWlybgOpbJs

Expected it to be longer, but I found all the secrets straight off for a change, so a little over 5 hours in the end. Heh, I doubt Guardians will be quite as forgiving.