The 2 lower ones are from Japan. Can anyone tell me a little more about them?
@aerobear the red Japanese special postmark is categorized as a 風景印 Fukei-in. Here is Japan Post’s description. You have the second postmark in black ink, because they need to add the stamp in English for international mail.
Those postmarks are from a Post Office in an outlet mall in Hiroshima. It is Japan Post’s first post office that is dedicated to their mascot, ぽすくま Posu Kuma (Post Bear).
Outside and inside of the post office.
And here is my rare postmark.
USA McMurdo research station in Antarctica.
Yes, I deliberately chose the Penguin stamps 