Declared a national park in 1980, Khao Sok in southern Thailand’s Surat Thani Province is a primeval wilderness frozen in time. Towering limestone karsts and winding rivers carve through a sprawling rainforest so ancient it once lay beneath a prehistoric ocean. At 160 million years old, Khao Sok’s evergreen rainforest offers travellers a rare glimpse into a world that has survived ice ages, shifting continents and humanity’s relentless march.

The Telaga Waja River, flowing down the verdant slopes of Mount Agung in East Bali, is best known today for its rafting adventures but beneath its rushing waters lies a deep, often overlooked historical and cultural undercurrent. Historically, this river has served as both a geographical and spiritual artery for the people of Karangasem. It provides water for rice fields through a traditional irrigation system called subak and many Balinese believe it to be sacred.

The Ayung River is Bali’s longest waterway, stretching 68.5 km's from the lush northern highlands down to the southern coast at Sanur. It snakes its way through deep gorges, remote jungles, rice terraces and traditional villages, making it one of the island’s most scenic natural features. Despite its size, the Ayung maintains a gentle flow for much of its length, making it ideal for outdoor activities like rafting and river trekking.

Shaped by both chance and design, one of Bali’s most unexpected natural wonders is Kanto Lampo Waterfall. Unlike the island’s ancient cascades that have poured down jungle cliffs for centuries, this waterfall is a relatively recent creation. In the early 2010s, adjustments to a local irrigation system redirected water across a rocky cliffside and over time the flow carved its way over volcanic stone, giving rise to the unique cascade we see today.