Awesome town in Northern Cambodia. Accommodation for all types of travelers. Night bazar that will surely amaze anyone. Great restaurants at affordable prices.
Siem Riep is a backpackers destination. With tons of hostels and night life, any backpacker is sure to make friends in this city. Angkor Wat is a must see, just keep in mind it can get uncomfortably hot so either go early morning or later in the evening.
Incredible concentration of world class temples. But not only as there are more and more activities, like massage, bike tour in the countryside, visit of workshops, cooking or cocktail classes, excellent restaurants, etc.
Bring water and prepare for a long walk... be sure to visit nearby temples like bayon and others..