The Vava’u Islands are a northern island group of the Kingdom of Tonga, located in the vast Pacific Ocean. The Vava’u Islands consist of 34 islands, with a land area of 115 square kilometers and a population of 13,000. Of these, Vava’u Island is the largest, with a land area of 89 square kilometers. Neiafu in the south of the island is the administrative center of the archipelago and the second largest port in Tonga.

The islands are known for their many limestone caves, which are formed by the erosion and impact of seawater on rock layers. When the waves hit, the seawater sprays through the cavities into the air, some reaching over 10 meters high. In the sunlight, the splashing water sparkles brilliantly, creating a stunning sight. The island’s limestone caves, especially the seaside caves on Vava’u Island, are quite large. For example, there is a cave known as “Swallow’s Cave,” which resembles a magnificent hall with a height of 30 meters and a circumference of over 60 meters. Sunlight entering through the mouth of the cave reflects onto the walls from the water’s surface, producing a colorful and surreal scene. Most of the islands are lush with forests, and amidst the greenery are lagoons resembling sapphire jewels. The Vava’u Islands boast dozens of small bays, where the blue and transparent waters along the shores are home to diverse coral reefs, making it an ideal paradise for diving enthusiasts and earning it the nickname “Little Hawaii.”