I made a fun book of postboxes, letter slots, post offices, and letter writing “still-lifes” resplendent with stationery, inky stamps and whatnot.
Order it up for amusement and edification. https://www.blurb.com/b/9807308-posted-letters-to-elsewhere
“Ideal for armchair-travelling kids and adults alike, this portable geography primer includes 42 pages of delightful, lovingly curated and collected letter boxes, stationery, post offices, plus other postal artifacts gathered from: Thailand, Japan, Malaysia, The Vatican, Nepal, Greece, Canada, United States, Oman, Australia, Italy, Sri Lanka, Indonesia, a few other locales and the high seas.”
Fits handily in a rucksack and doesn’t use too much space on a shelf. It’s pretty! Order several.