Short trip but extensive exploration in both Siem Reap and Phnom Penh. Be sure that you will be able to compare the situation between Angkorain and Post-Angkorian Period.
This itinerary is designed for travelers who are interested in the ancient capital city to modern one ie. Siem Reap to Phnom Penh. You will be admired for Cambodia's rich culture and civilization in Angkorian period and experience in brutalities of Khmer Rough time which made Cambodia back-step in Year Zero in 20th century. Also, you are definitely recognizing the sustainable development in 21 century after a civil war.
Let a local host show you around and experience this cultural attraction from a local perspective.