The eight main islands and more than 22 smaller islands have a total land area of , consisting primarily of low, flat limestone with extensive marshes and mangrove swamps and of beach front. The tallest peaks in the islands are Blue Hills on Providenciales and Flamingo Hill on East Caicos, both at a modest 48m. The weather is usually sunny (it is generally regarded that the islands receive 350 days of sun each year) and relatively dry, but suffers frequent hurricanes. The islands have limited natural fresh water resources; private cisterns collect rainwater for drinking. The primary natural resources are spiny lobster, conch, and other shellfish.Turks and Caicos contains three terrestrial ecoregions: Bahamian dry forests, Bahamian pine mosaic, and Bahamian mangroves.