Tonga

A 1,000-year-old coral-limestone trilithon near Nukualofa, built under King Tuʻi Tonga Tuʻitatui and aligned to track the winter solstice sunrise — Tonga's most significant ancient monument.

A 7-kilometre stretch of Tongatapu's southern coast where wave action drives seawater through lava-tube fissures, producing dramatic geysers that can reach 20–30 metres on a big swell.

Tongatapu's most popular beach on the east coast, with white sand, a natural sea cave and accessible calm waters ideal for swimming, snorkelling and experiencing Tongan coastal life.

The official residence of the King of Tonga, a three-storey wooden palace built in 1867 on the seafront of Nuku'alofa, unique in the Pacific for its blend of European and Tongan architectural traditions.

A limestone cave system on the island of Lifuka in the Ha'apai group, containing stalactite and stalagmite formations and the remnants of ancient burial practices that predate European contact with Tonga.

The Vava'u archipelago in northern Tonga hosts one of the South Pacific's most accessible humpback whale breeding grounds, where swimming with whales is permitted under a strict licensed operator system from July to October.