Tonga's most important ancient monuments are found at Mu'a, on the eastern coast of Tongatapu. This was the seat of the ancient Tu'i Tonga dynasty, believed to have been of divine origin. Captain James Cook landed here after sailing HMS Endeavour into the sheltered waters of the inner lagoon — a plaque marks the spot.
Lapaha, the royal compound at Mu'a, contains 28 langi — tiered burial mounds of ancient royalty, faced with massive stone slabs cut from coralline limestone at nearby reefs. The most impressive tomb in the South Pacific is the Paepae 'o Tele'a, built over 300 years ago for the 28th Tu'i Tonga. The term paepae indicates that the physical body of the king was not buried here. Nearby stand the Namoala, a three-tiered pyramid with a stone burial vault still intact on top, and the Hehea mound opposite, which holds two further vaults.