The Matobo Hills are a landscape of granite domes and balancing boulders in southern Zimbabwe, and none of those boulders was ever stacked. The granite cracked into blocks while it was still underground. Groundwater seeped down the cracks and rotted the rock along them, gnawing each square block into a rounded core. When erosion stripped away the crumbled material between them, the cores were left sitting exactly where they had formed, one on top of another. The bare whaleback domes you walk on are called dwalas. The overhangs here hold one of the richest concentrations of rock art in southern Africa, and the finest are outside the park. At Silozwane, on communal land where a village guide joins you near the school, a curved overhang carries giraffe, kudu and rows of elongated human figures in red ochre, layered across generations.
The rock is still in use. At Njelele, the most powerful shrine in the country, petitioners do not read an answer off the stone. They wait to hear one spoken out of it. Rhino are followed on foot here. Rangers read spoor and dung through the scrub until you are a few dozen metres from a grazing black or white rhino, then put a hand up for everyone to stop moving. Verreaux's eagles hunt the same rock by surprise, sweeping low around a dome so the dassies on the far side never see them coming. The Matobo holds the densest breeding population known anywhere. A staircase cut into bare rock climbs Malindidzimu, where balancing boulders ring the summit and Cecil Rhodes chose to be buried in 1902. Since Malindidzimu is a hill of ancestral spirits, Zimbabweans have argued for decades that he should not be there. The best known stack stands elsewhere in the hills. The Mother and Child reads from the road as a tall figure holding a smaller one. Up close, its top boulder turns out to rest on a patch of rock you could cover with both hands.