Ha'amonga 'a Maui Trilithon is an ancient monumental structure located on the island of Tongatapu, Tonga. The trilithon consists of three large coral limestone slabs, believed to have been erected in the 13th century. While its original purpose remains debated, it is thought to have served as a gateway or astronomical marker. The site is generally accessible year-round, with minimal seasonal restrictions, though weather can affect the visit. It is usually a low-cost destination, mainly involving transportation to the site. A typical visit lasts about an hour or two. Solo visits are possible, but a guided tour can offer deeper insights into the history and significance of the site. Accessibility is somewhat limited due to the natural terrain. Consider footwear suitable for walking on uneven ground.