I have some information about this country.
Source: the lonely planet
http://www.lonelyplanet.com/maps/asia/cambodia/
Phnom Penh(金邊)
With its French colonial architecture, Buddhist temples and haunting remnants of the Khmer Rouge, Phnom Penh has one of Cambodia's most complete records of national history. While most tourists travel to Cambodia with Angkor Wat in mind, Phnom Penh is riveting and is still on tourist's itinerary.
The city is named after a woman called Penh who discovered a set of Buddhist relics on a nearby hill (phnom). Today, that hill is crowned with Wat Phnom, the most important temple in the region. This is a good place to begin a tour of the city center, which goes on to include the stately Royal Palace and blocks of French colonial architecture. Boutique hotels in Phnom Penh are on the rise, with many housed in these century-old colonial gems.
While the central attractions can all be seen on foot, transportation is necessary for visiting somber sites related to the Khmer Rouge. The Killing Fields, a former Chinese cemetery turned mass grave, were central to the genocide, and today they're a compelling memorial. The two other major stops are Tol Sleng detention camp and the Genocide Museum. Under the Khmer Rouge, Phnom Penh was abandoned and fell into disrepair. People started returning in 1979, and the enthusiasm with which they refurbished their city is contagious. Today, staying in a centrally-located Phnom Penh hotel gives tourists the chance to experience this excitement firsthand, in a city that's bound to become a leader in Southeast Asian tourism.
Phnom Penh is accessed via Phnom Penh International Airport, just seven kilometers from the city center.
Angkor Wat(吳哥窟)
Angkor Wat is a beautiful and fascinating place. It was created by the Khmer kings in a process that lasts almost 4 centuries, this magnificent area has been abandoned and then hidden by the dense forest. It was re-discovered by a French man about 150 years ago.
Angkor Wat has become one of the most visited archaeological and artistic site for tourist to see the ruins of magnificent temples.
http://whc.unesco.org/en/list/668
Siem Reap(暹粒)
Siem Reap has just re-built its international airport, it also has new pubs, cafes hotels and restaurants for visitors.
Sunday Times expert Richard Green's advice: Cambodia has a tropical climate and is warm all year round on average daytime temperatures of about 28 degrees Celsius.
However, you should try and avoid the rainy season, which runs from May to October, which sees about 75% of the yearly rainfall.
A trip to Angkor will involve lots of walking around the huge temple compounds, and there is precious little shelter from heavy rain. At the peak of wet season - from July to September - it can rain two out of every three days. Having said that, it does tend to be a few hours bucketing it down, rather than all-day downpours.
Aside from getting soaked, the wet season brings even worse road conditions and the possibility of flooding. The capital is even prone to some localised flooding at the end of July and beginning of August. Don't worry about the main roads from Phnom Penh to Siem Reap, and Phnom Penh to Sihanoukville, which are now all-weather, sealed roads.
If for any reason you have to travel in the rainy season, the country is fabulously green and lush, and bird life is at its most easy to spot.
So it¹s the dry season, from November to April, is the best time to visit, though try and be gone by April, which is hair dryer hot on your face.
November to January is relatively cool, and this is the peak tourist season for the country.
As the dry season progresses, the worst of the potholed roads get some repairs and driving gets easier and quicker, but it can get very dusty.
Incidentally, the country's beach strips are at Kep, Sihanoukville and Ko Kong are also at their clear-skied best during the dry season.
Travel guide to Cambodia: http://www.visitcambodia.org/Travel-Guides/phnom-penh.html
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