May blessings be upon you!
If you travel about an half hour or so outside of Siem Reap
and the Angkor Wat temple complexes you’ll eventually find Phnom Kulen, or more commonly known as the "mountain of the lychees". This sacred mountain is also known as the birth place of the ancient Khmer Empire, and its temple complex as well as large leaning Buddha will enthrall you. Tread carefully though, unfortunately Cambodia still has a significant land mine problem. Pay attention to your guide and only walk on well-worn paths. Check out the river and waterfalls before you leave, they are close by. Also hiring a tuck tuck to get you to the top of the mountain really isn't possible. We hired mopeds for the day in Siem Reap instead to make it to the top