Observatory Ridge is the highest point in Johannesburg, South Africa. It is above sea level. It is in the suburb of Observatory. There is a large sandstone monument on top of the ridge that commemorates the British Indian Army. The monument bears the inscription: "To the memory of British Officers, Natives, NCOs and Men, Veterinary Assistants, Nalbands, and Followers of the Indian Army". References Geography of Johannesburg Tourist attractions in Johannesburg