Namibia is one of the world's most arid countries, yet it has a unique and captivating beauty. The vast Namib Desert occupies much of the territory and gave the nation its name. To the north and east of the sandy wilderness lie rocky deserts with moonscapes, and dry thornveld savanna. Where the Namib meets the cold Atlantic Ocean, unusual weather conditions prevail and the resultant mist and fog in the early mornings brings moisture to help sustain a wide variety of desert creatures. The Skeleton Coast is the treacherous stretch of coastline to the north of Swakopmund. The Orange River forms the border with South Africa, and the Kunene and Kavango Rivers run along the northern frontier. In between, there is precious little water at all. Etosha National Park - one of the world's largest and most famous wildlife sanctuaries - is set in the northern savanna region.