Angkor is composed of 287 temples over 400 square km. Obviously it is difficult to visit every temple of the park. First you will need to spend a lot of time in this city; secondly you will get bored by those temples at a certain point.
Hence they have designed 2 different tours of the most interesting temples that can be easily accessed by any transportation you choose:
Here is a picture showing both tours:

You will discover beautiful temples in each tour. One of the most amazing scene is the sunrise on Angkor Wat.
The sunset on top of Phnom Bakheng is also nice:
This two possibilities are included in the small tour. You will notice that some of temples are at present in renovation and others tend to disappear one day.
Unfortunately visiting these temples is not free. You need to buy a pass that can be issued directly at the entrance of the site. It is very easy to get this pass at 5am in the morning when everybody is watching the sunrise on Angkor Wat, afterward it is crowded and you have to file up .
They offer different options:
Those pass are valid for only one person. They take a picture of you which appear on it so it is not possible to share it with anybody else.
It is valid from Sunrise (5am) to Sunset. However pass issued after 5:00pm are valid for the next day. So if you plan to stay only one day, visiting temple from sunrise to sunset is really exhausting. So I suggest you to buy a pass after 5pm the day before, go and watch the sunset on the Phnom Bakheng temple then the next day you can come back for the sunrise and leave when you are tired.
Angkor Temples are located at 8km from Siem Reap. You can forget the idea to visit them on foot. So it remains only 3 solutions:
Honestly I preferred using the services of a tuk tuk, it is a typical Cambodian experience that you should not miss. Here is one of the tuk tuks:
When visiting the temple I’ve noticed that a lot of people were hiring a guide. It is not so expensive even though it is not really needed. A good English speaking tour guide normally costs between US$20 and US$25. They also provide tour guides for many other languages but I’ve been told to be very careful. It seems they are not really fluent so it is sometimes very annoying because they don’t really understand you. The best is to know somebody who already used their services.
It is really a wonderful and amazing trip.
First advice: be careful, because the park is very big and you need more than one hour to go from the town to the farthest temples. During rush hours some of them are invaded by tourists. It is better to visit the temple when its less crowded so I recommend to leave your hotel the earliest possible.
Second Advice: don’t forget to take an anti-malaria treatment and bring with you specific tropical regions products against mosquitos because the temples are located in the center of the tropical forest with malaria risks.
[...] my previous article regarding the different approaches to visit Angkor, I’ve explained that every tuk-tuk will offer their services to visit the park for a very [...]