Passport Requirements for U.S.While Puerto Rico is a territory of the United States, it is not considered a foreign country for passport purposes. Therefore, U.S. citizens do not need a passport to travel from the mainland U.S. to Puerto Rico.
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Peru has some of the coolest stamps in our opinion. From the spectacular and remote Rainbow Mountain to Machu Picchu and of course the Nazca Lines further south, there is no shortage of awesome and unique passport stamps in Peru.
Tristan da CunhaTristan da Cunha is a group of volcanic islands in the South Atlantic Ocean and the boat ride takes between five to ten days from Cape Town, South Africa. Psst, that 24-hour ferry to Chichijima doesn't seem too bad now, does it? This is truly one of the hardest passport stamps to get in the world.
If everything is running like clockwork, however, you have absolutely nothing to lose by asking politely for an official stamp. More often than not, the officer will be happy to give you one and you'll have an extra memory to take away from your travels. It can even work in places where there isn't immigration.