Passport stamps around the world

One of the things that a traveler might overlook are the passport stamps. Well, those are just stamps after all. Those imprints that the immigration officers leave in your passport as an official assurance of your entry to their country. Sometimes, these impressions can make your passport looks grimy and old.
But there are stamps that are just pretty cool that you might want to consider it as a form of souvenir as well. In fact, there are stamps that you have to request and pay for them as souvenirs. Never mind the price, they are actually good-looking.
So, here are compilations of some stamps in my passport. I bet some may impress you.


Which is your favorite passport visa / stamp so far?