Chinhoyi
Chinhoyi is in Mashonaland, Zimbabwe.
See
Chinhoyi Caves
Chinhoyi Caves are approximately 120 km from Harare. The caves are mostly water-filled, and are very deep, exceeding 120 m in depth. The full cave system has not yet been explored.
The caves are situated within a national park, so you will need to pay an entrance fee. Additionally, if you intend to dive, you need to get the appropriate permit and supervision.
This is not a dive site for inexperienced divers, and years of extensive training in Technical Diving and Cave Diving are mandatory if you want to dive the site. However, if you have the required expertise this is one of the most spectacular cave diving sites worldwide. There are no diving facilities available on-site so you will need to bring all your own equipment.