Angkor Wat is the largest religious monument in the world and the supreme achievement of Khmer architecture. It was built in the first half of the 12th century, around 1113 to 1150, for King Suryavarman II as a temple-mountain dedicated to the Hindu god Vishnu, and later transformed into a Buddhist site. Its five lotus-bud towers, raised on a vast moated platform and reflected in the pools at dawn, have become the emblem of Cambodia itself — the only building to appear on a national flag. The temple's galleries carry nearly a kilometre of carved bas-reliefs depicting Hindu epics, churning oceans and marching armies.
But Angkor Wat is only the beginning. The wider Angkor Archaeological Park spreads across a vast forested landscape that was once the heart of the Khmer Empire, home to hundreds of temples built between the 9th and 15th centuries. At its centre stands the walled royal city of Angkor Thom, entered through monumental gates and crowned by the Bayon — a temple-mountain studded with more than two hundred huge, serene stone faces gazing out in every direction. A short distance away, Ta Prohm has been left much as explorers found it, its corridors gripped by the roots of giant strangler figs and silk-cotton trees in one of the most photographed marriages of stone and jungle anywhere.
The park rewards time. A single day is enough for the essential trio — Angkor Wat at sunrise, the Bayon, and Ta Prohm — but three days is the sweet spot, opening up Angkor Thom in full, the river-of-a-thousand-lingas at Kbal Spean, and the exquisite pink-sandstone carving of Banteay Srei. The pass is open-dated: you choose your own days within its window and arrive when it suits you, with no fixed time slot to book. Angkor was inscribed by UNESCO as a World Heritage Site in 1992.