Those who want to get beneath the surface of Eswatini (Swaziland) – literally – could try this innovative activity run by Swazi Trails. It explores a unique cave system formed by the Kophola River that flows underground between Msunduza and Kophola Mountains, just off the Malagwane Hill between Mbabane and the Ezulwini Valley. There is an 800m course of subterranean passages some 90m below ground. This is the only major granite cave system known in Southern Africa, and comprises a series of water-eroded chambers with names such as Key Hole, French Connection and (for Harry Potter fans) Platform Nine and Three-Quarters’. Progress is slow and strenuous – with belly crawls, body jams and fluttering bats – but no experience is necessary. Participants must be reasonably fit, aged 8–65, and able to fit through narrow passageways. All necessary equipment is provided and trained guides accompany the two-hour course course.