Tanzania’s rapidly expanding tourism sector continues to be a source of great economic promise. Mount Kilimanjaro, the highest peak in Africa, serves as a major tourist attraction, as does the country’s network of national parks, reserves, and conservation areas, which together span some one-fourth of the country. Tanzania’s beaches and coral reefs are also attractive to tourists, and the government has increasingly marketed its coastline and encouraged diving and snorkeling there. Neighbouring Kenya supplies the vast majority of visitors to Tanzania, many of whom visit the country on short day trips. By the early 2000s, tourism accounted for almost one-fifth of the gross domestic product, while the services sector on the whole accounted for almost two-fifths.