Tonga - On Tonga you can party and drink kava at festivals till you drop, be impressed by the Sunday church turn outs, and then escape to deserted beaches where, between snorkelling in untouched coral gardens and sipping coconut juice, the most you need do is watch the waves slap against the shore. But there's a more active side to island life, with possibilities for hiking through Pacific rainforest to crater lakes and to the lips of active volcanoes, diving to shipwrecks and underwater canyons, abseiling down seaside cliffs or watching the local rugby team go through its paces.