Prasat Koh Keh, Cambodia

Koh Ker is a 10th-century temple complex in the north Cambodian jungle. A former capital of the Khmer Empire, the site is now remote and heavily forested. The main structure, Koh Ker Temple, is a stepped 7-tiered pyramid. The large rectangular tank, Rahal Baray, supplied water to the complex. The Prasat Krahom, meaning "red temple," is known for its sandstone carvings, while Prasat Pram is covered in strangler figs. Koh Ker is 127km northeast of Siem Reap. Long one of Cambodia's most remote and inaccessible temple complexes, the opening of a toll road from Dam Dek (via Beng Mealea) put Koh Ker (pronounced ko-kayer) within striking distance of Siem Reap.