The interior of the country consists of low highlands (around 200 metres) and dense forests, sometimes savannah. Towards the west and south are some mountain tabular form structures, along the border with Venezuela, Serra Pacaraima, where is the maximum height of the country, Mount Roraima (2,810 metres), on the border between Guyana, Venezuela and Brazil; to the south towards the border with Brazil is the Serra Acaraí that slightly exceeds the 1,000 meters. The main rivers of Guyana are the Essequibo, Demerara, Courantyne and Berbice. The country is rich in mineral resources, are extracted bauxite (one of the leading world producers), gold, diamonds, asbestos and manganese. Among the main agricultural products of the country are rice, sugarcane, coffee, cocoa, bananas, citrus fruits, coconuts, corn, cassava. Substantial wealth is the forest, very rich in hardwood timber. Modest are farming (pigs, sheep, goats and poultry), and fishing (especially shrimp). The industry is limited to the processing of agricultural and mineral products (sugar mills, distilleries, breweries, tobacco manufacturers). The main tourist attraction in the country are the Kaieteur Falls (226 meters jump), along the Potaro River, one of the most spectacular in the world.