I have never been to Cambodia. So I'll defer to people who have, and recommend them to you.
In the video above, a Top 10 compilation by the seemingly always-travelling crew at Vancouver-based SundayFundayz, you'll find a few suggestions that will appeal to a wide variety of travellers.
History lovers will clamour for the temples of Angkor Wat of a somber tour through the Killing Fields, while high-adrenaline backpackers are no doubt already jonesing to fire a rocket launcher in the Cambodian jungle, or to spend a few nights at Wish You Were Here hostel in Sihanookville.
Below is the group's full video tour of Cambodia, filmed in 2012. Enjoy.
VIDEO: A Holiday in Cambodia (via SundayFundayz on YouTube)