Day 1: Phnom Kulen Group Excursions, 1000 Linga River and Reclining Buddha Visit Phnom Kulen Mountain on this full-day tour from Siem Reap that explores ancient Khmer sites in lush jungle surroundings. See a boulder carved into a reclining Buddha image, take in the River of a Thousand Lingas, and swim beneath Phnom Kulen Waterfalls, experiencing a landscape that many Cambodians consider sacred. Hear commentary from your guide about each site, and enjoy convenient hotel pickup and drop-off. Meet a driver at your hotel in Siem Reap for the scenic, 2-hour trip to Phnom Kulen Mountain, passing a landscape of tropical forest and rural communities in your air-conditioned vehicle.  The first stop of the day is a hilltop temple, where you’ll find a massive reclining Buddha carved directly into a sandstone boulder. Next, head to the River of a Thousand Lingas, exploring a riverbank adorned with ancient carvings of phalluses and Hindu gods. Cool off at another sacred site, Phnom Kulen Waterfalls, which tumble into a wide basin that’s ideal for a midday swim or wade. Throughout the day, the guide will help bring the ancient sites to life by explaining their significance and symbolism, and you’ll have time to purchase lunch at a local restaurant before the return trip to Siem Reap. Day 2 : ShareSaveBeng Melea and Koh Ker Temple - Group Tour Visit two of the outer temples of the Angkor Archaeological Park on this full-day tour from Siem Reap. Your guide leads you through the grounds of Beng Melea and Koh Ker, part of Cambodia’s famous UNESCO World Heritage Site. It’s worth making the 1-hour journey to these temples, which are less crowded but just as fascinating as Angkor Wat. This morning we drive to Beng Mealea and Koh Ker begins with a pick-up from your hotel in Siem Reap. Your driver guide will take you through lush Khmer countryside to the remote Beng Mealea temple. Explore the 11th-century ruins emerging from the tangled overgrowth of Cambodian jungle at Beng Mealea, then enjoy a picnic lunch in the grounds. After taking in the ancient beauty of the temple, drive 1-hour onwards to Koh Ker, north-east of Siem Reap. Discover the ancient Koh Ker temples, once known as Chok Gargyar. This was the Khmer capital under Jayavarman, before the capital was moved to Angkor Wat in 944 A.D. At Koh Ker, explore the 30 major structures of the mysterious site and walk through the ruins of sacred buildings and religious sculptures. Some of the giant sculptures from Koh Ker now make-up the collection at the grand National Museum in Phnom Penh. After your full-day visiting Cambodia's lost temples and mystical jungles, you'll be driven back to your hotel in Siem Reap.