Tonga is an archipelago of one hundred fifty islands, thirty-six of which are inhabited.
There are four major groups of islands: the Tongatapu, Ha'apai, Vava'u, and Niua groups.
some are volcanic, and a few are atolls.
Coral beaches lined with palm trees and emerald lagoons with luxuriant tropical vegetation are characteristic features.
The capital, Nuku'alofa, is on Tongatapu.