Kaapmuiden (Cape Mouth) is a small farming town situated at the confluence of the Kaap and Crocodile Rivers in Mpumalanga, South Africa.

The town lies just off the N4 national highway and is marked by a large abandoned silo visible from the road.

The Nkomazi Tollgate was subsequently built on the N4 national route (Maputo Corridor) on the eastern outskirts of the town.

[2] In June 1890, Eugene, the younger of the Barons Oppenheim, sought to obtain a concession from the Government of the Zuid-Afrikaansche Republiek to construct a railway line to the Murchison Range goldfields along the Ga-Selati River.

Work on the construction of the Selati Railway in the Transvaal Lowveld began early in 1893, with the line branching off from the Pretoria-Delagoa Bay mainline at a junction near Komatipoort.