Welcome upon arrival at Phnom Penh airport. Transfer to hotel. Visit the Victory Monument and the National Museum, the Royal Palace built by the French in 1866 on the site of the old town, and Silver Pagoda, which is located within the Royal Palace grounds. You will then end your tour with a visit to Wat Phnom Temple , Phnom Penh 's namesake, from where you can enjoy views over the tree-lined avenues of the city during sunset. 
Overnight in Phnom Penh

Transfer to Phnom Penh airport for departure to Siem Reap. Upon arrival at Siem Reap airport, welcome and transfer to hotel. 
Visit the ancient capital of Angkor Thom (12th century). See the South Gate (with its huge statues depicting the churning of the ocean of milk), Bayon Temple (unique for its 54 towers decorated with over 200 smiling faces of Avolokitesvara), the Royal Enclosure, Phimeanakas, the Elephant Terrace and the Terrace of the Leper King. 
In the afternoon, visit the most famous of all the temples on the Angkor plain: Angkor Wat. The temple complex covers 81 hectares and is comparable in size to the Imperial Palace in Beijing . Its distinctive five towers are emblazoned on the Cambodian flag and the 12th century masterpiece is considered by art historians to be the prime example of classical Khmer art and architecture. Angkor Wat's five tower symbolize Meru's five peaks, the enclosed wall represents the mountains at the edge of the world and the surrounding moat symbolizes the ocean beyond. 
Sunset from Phnom Bakheng, one of two hills dominating the plain of Angkor, from where you will have a spectacular view of West Baray and Angkor Wat. 
Overnight in Siem Reap

Breakfast at hotel. In the morning, you will continue your temple visits. Included are Prasat Kravan (with its unique brick sculptures), Sra Srang ("The Royal Baths" was once used for ritual bathing), Banteay Kdei (surrounded by four concentric walls), Eastern Mebon (guarded at its corner by stone figures of harnessed elephants, some of which are still in a reasonable state of preservation) and the "Mountain Temple " of Pre Rup.
In the afternoon, transfer to the archaeological site and continue the temple tour. Visit Ta Prohm, one of the most beautiful temples in the area. Ta Prohm has been left relatively untouched since it was discovered and retains much of its mystery. Then visit Takeo, Thommanon and Chau Say Tevoda temples. Transfer to Siem Reap airport for departure to next destination.