There are nearly a hundred crumbling temples hidden amongst the lush jungle. Prasat Thom is perhaps the best known and easily recognized by its towering pyramid shape and moat running around the base. At 40 meters high this is also the largest temple in the area and climbing to the top offers spectacular views across the jungle.
Many of these 10th century temples have been built from brick and mortar made from tree sap and have been very well preserved. Other temples of interest include Preah Vihear and Preah Kahn and a great way to explore is by taking a guided tour in an ox cart.
You can also hire a motorbike and zoom through the jungle. Take care if you choose this option as although the area has extensively been cleared of landmines there may still be some around. Stick to the well-worn paths at all times to avoid trouble.
Koh Ker is close enough to Siem Reap to visit on a day trip, or you can stay overnight at the little village of Sra Yong, where you are sure to receive a warm welcome along with basic accommodation and traditional home cooking. It is also possible to camp in this area, and the picturesque jungle is a great place to wake up in the morning.