A very interesting post and the first time I have seen someone do sketches of their holiday. This is very different and really refreshing. Something in each placed must have sparked you to draw what you did and it must bring back fond memories. Thank you for sharing such a wonderful trip.
Thank you @cryptoandcoffee for your kind comments - I think I've always taken a sketch book on trips. I don't try to capture the essence of a place, or the main attractions. Just things that look interesting and have good form, shadow and contrast. The last drawing is an abstraction of a museum installation, where I added patterning from pottery I saw on display. so some drawings are completely abstract. Last year I visited Portugal and had more time to sketch. You can see it here https://steemit.com/travel/@mrsomebody/sketchtravel-in-portugal
So you draw it then or from memory. I thought maybe you took a few photographs and then incorporated some ideas. It is fantastic however you do it though and will look for Portugal now.