On the other hand, the USA has a semi-enclave, which is rather unusual; you have to cross Canada if you want to get from Washington to Alaska by land. Russia ha

On the other hand, the USA has a semi-enclave, which is rather unusual; you have to cross Canada if you want to get from Washington to Alaska by land. Russia has Kaliningrad but that's not quite on the same scale. From a British perspective, though, these distinctions are rather hard to make - Britain has between the largest number of semi-enclaves in the world and none, depending on how you count the many former imperial territories.