Along the R59 motorway south of Johannesburg on the route to Vereeniging.
Situated behind the Engen Blockhouse One Stop South garage approx 23km from the junction in Alberton of the R59 and N12. Exit the freeway at the Engen Blockhouse One Stop South. There is a footpath to the Blockhouse.
GPS: 26 deg 28 min 6.29 sec S, 28 deg 4 min 9.22 sec E
Significance
This is the only remaining example of the Vereeniging Pattern blockhouse erected to protect the railway line from Vereeniging to Elandsfontein (now Germiston).
These could be either in two and three-storeyed; Witkop is three-storeyed. They were covered with a corrugated gabled roof with the gable and walls rising above the roof.
A small turret of timber and corrugated iron near one end of the ridge of the roof and entered by a ladder from inside, provided a view over the surrounding countryside.
There are flat-roofed angle bastions at diagonally opposite corners to provide ground level fire along the walls.
The Witkop Blockhouse was declared a national monument in 1948.
