After about one-hundred and twenty-four kilometres from the city of Siem Reap, you will find this temple. Koh Ker was named the capital city of the Khmer period for around sixteen years back in the days of the ruling. The huge pyramid and the surrounding grounds are usually skipped during explorations, as the temple is a long and hard place to look around, with over a hundred kilometres to cover in a short time. Having said that, the tiresome walk will definitely be worth it, once you see the magnificence it has to offer. Apart from Koh Ker, there are other beautiful temples and fascinating attractions you can visit around the area too.