After about 45 minutes driving, the road changed from tar to dirt, signaling our arrival in Bolivia. The border migration office is basically just a small mud hut in the middle of the desert. Here our minibus dropped us off and we split into two groups of six to fit into the two 4x4's (both Toyota Land Cruiser's - all the tour companies seem to use them exclusively.) South Africans need a visa for Bolivia, so we had to hand our passports to our driver who would g...