UNESCO World Heritage Sites refer to landmark(s) which is/are officially recognized by the United Nations, specifically by UNESCO. Sites are selected on the basis of having cultural, historical, scientific or some other form of significance, and they are legally protected by international treaties. UNESCO regards these sites as being important to the collective interests of humanity.
More specifically, a World Heritage Site is an already classified landmark on the earth; which by way of being unique in some respect as a geographically and historically identifiable piece is of special cultural or physical significance (such as either due to hosting an ancient ruins or some historical structure, building, city, complex, desert, forest, island, lake, monument, or mountain); and symbolizes a remarkable footprint of extreme human endeavor.
This is often coupled with some act of indisputable accomplishment of humanity which then serves as a surviving evidence of its intellectual existence on the planet. And with an ignoble intent of its practical conservation for posterity; but which otherwise could be subject to inherent risk of endangerment from human or animal trespassing; owing to unmonitored/uncontrolled/unrestricted nature of access or threat by natural or accelerated extinction owing to local administrative negligence. Hence it would have been listed and demarcated by UNESCO to have been identified and officially internationally christened through multilateral declaration by UNESCO as a universally protected zone.
The list is maintained by the international World Heritage Programme which has 21 UNESCO member states; all elected by the General Assembly. Only these administer the list.
There are three UNESCO World Heritage Sites in Uganda ; two of them are National Parks; Bwindi Impenetrable Forest National Park and Rwenzori Mountains National Park; the other is a cultural site, Kasubi Tombs. This is presently under reconstruction after an unfortunate fire several years back.