Curiosity is key when you’re an explorer — but on the long border road between Mapungubwe and Kgalgadi is a chap who will really open your eyes.

Kingsley Holgate and his Mzansi Edge expedition team rendezvoused with agriculture department employees Jan Engelbrcht and Niclaas Titus on the Namibian fence line south of the Kalagadi Transfrontier Park and drove with them as far as the Orange River, he recalled on Friday...