This description provides information about the total number of World Heritage Mixed Sites as of 2019. A World Heritage Mixed Site is a site that has been inscribed on the World Heritage List by UNESCO for both its natural and cultural significance. As of 2019, there are no World Heritage Mixed Sites, meaning that
From Wikipedia
World Heritage Sites are landmarks and areas with legal protection under an international treaty administered by UNESCO for having cultural, historical, or scientific significance. The sites are judged to contain "cultural and natural heritage around the world considered to be of outstanding value to humanity".