Large numbers of elephants, black rhinoceroses, cheetahs, giraffes, hippopotamuses and crocodiles live in this immense sanctuary, which measures 50,000 km2and is relatively undisturbed by human impact. The park has a variety of vegetation zones, ranging from dense thickets to open wooded grasslands. © UNESCO

The atoll is comprised of four large coral islands which enclose a shallow lagoon; the group of islands is itself surrounded by a coral reef. Due to difficulties of access and the atoll's isolation, Aldabra has been protected from human influence and thus retains some 152,000 giant tortoises, the world's largest population of this reptile. © UNESCO

This park is one of the last major remnants of the primary tropical forest of West Africa. Its rich natural flora, and threatened mammal species such as the pygmy hippopotamus and 11 species of monkeys, are of great scientific interest. © UNESCO

Located on the watershed of the Río Plátano, the reserve is one of the few remains of a tropical rainforest in Central America and has an abundant and varied plant and wildlife. In its mountainous landscape sloping down to the Caribbean coast, over 2,000 indigenous people have preserved their traditional way of life. © UNESCO

A remarkable example of isolated oceanic islands, born of volcanic activity more than 2,000 m under the sea, these islands boast a spectacular topography and are home to numerous endemic species, especially birds. © UNESCO

In a region that has been subjected to severe glaciation, these parks and reserves, with their steep gorges, covering an area of over 1 million ha, constitute one of the last expanses of temperate rainforest in the world. Remains found in limestone caves attest to the human occupation of the area for more than 20,000 years. © UNESCO

Located in a strange lunar landscape of great geological interest, this site has one of the most important groupings of prehistoric cave art in the world. More than 15,000 drawings and engravings record the climatic changes, the animal migrations and the evolution of human life on the edge of the Sahara from 6000 BC to the first centuries of the present era. The geological formations are of outstanding scenic interest, with eroded sandstones forming ‘forests of rock’. © UNESCO

A vast area of primary tropical forest dominated by two spectacular extinct volcanoes, Kahuzi and Biega, the park has a diverse and abundant fauna. One of the last groups of eastern lowland (graueri) gorillas (consisting of only some 250 individuals) lives at between 2,100 and 2,400 m above sea-level. © UNESCO

The park's immense savannahs, grasslands and woodlands, interspersed with gallery forests along the river banks and the swampy depressions, are home to four large mammals: the elephant, giraffe, hippopotamus and above all the white rhinoceros. Though much larger than the black rhino, it is harmless; only some 30 individuals remain. © UNESCO

This breathtaking national park was formed by glaciers and is traversed by rivers and underground streams. Along the Tara river canyon, which has the deepest gorges in Europe, the dense pine forests are interspersed with clear lakes and harbour a wide range of endemic flora. © UNESCO