Landscape
Tuvalu consists of low coral islands and atolls spread across the Pacific. Land is narrow and only a short distance above sea level. Lagoons and reefs occupy a much larger area than the islands themselves.
Funafuti is an atoll with a large lagoon and settlement along part of its reef rim. Other islands have different reef and lagoon arrangements, including raised reef-island forms. None has a large mountainous interior or major river system.

