Large natural semi-circular hollow in the Drakensburg Mountain Range, North of the Lesetho border, in Kwa-Zulu Natal. Takes its name from its shape!
References
New Dictionary of South African Place Names by Peter E. Raper
Further Reading
https://www.drakensbergretreat.co.za/
https://www.safarinow.com/go/drakensbergmountainretreatbergville/