What is the name of the UNESCO World Heritage site located in the Democratic Republic of Congo, home to the lowland gorillas?

Which UNESCO natural World Heritage site is located in the Swiss Alps? What is the name of the UNESCO World Heritage site located in New Zealand's Fiordland National Park? What is the name of the UNESCO World Heritage site located in South Africa's Western Cape province, known for its uniqu… Which UNESCO World Heritage site is located in the Peruvian Andes and features the Inca city of Machu Picchu? What is the name of the UNESCO World Heritage site located in the Canadian Rockies, featuring glaciers and mountain pea… Which UNESCO World Heritage site is located in the Russian Far East and features a unique volcanic landscape? What is the name of the UNESCO World Heritage site located in the Namib Desert, known for its unique sand dunes? What river flows through China, Laos, Thailand, Cambodia, and Vietnam?