Ancient Peru was the seat of several prominent Andean civilizations, most notably that of the Incas whose empire was captured by the Spanish conquistadors in 1533. Peruvian independence was declared in 1821, and remaining Spanish forces defeated in 1824. Peru's economy reflects its varied geography - an arid coastal region, the Andes further inland, and tropical lands bordering Colombia and Brazil. Abundant mineral resources are found in the mountainous areas, and Peru's coastal waters provide excellent fishing grounds. However, overdependence on minerals and metals subjects the economy to fluctuations in world prices, and a lack of infrastructure deters trade and investment. After several years of inconsistent economic performance, the Peruvian economy grew by more than 4% per year during the period 2002-06, with a stable exchange rate and low inflation. Despite the strong macroeconomic performance, underemployment and poverty have stayed persistently high. Economic growth continues to be driven by exports of minerals, textiles, and agricultural products, and by expectations for the Camisea natural gas megaproject and for other promising energy projects.