Siem Reap (Angkor Wat)
Siem Reap is the closest town to Cambodia's famous Angkor Wat. Siem Reap is a comfortable and laid back town to use as a base when you're exploring Angkor Wat. It is a very touristy town with easy access to restaurants, hotels, and shops. The Angkor National Museum is worth a visit in town. The Landmine Museum outside of town is also worth a visit.
Many people travel to Siem Reap from Thailand either overland or by plane. Flights are obviously the more expensive option, but are efficient and reliable. If time is not a concern, you can take a bus to the border from Thailand and pick up a ride once in Cambodia. The road on the Cambodia side is in poor condition and frequently floods, which means your trip may be very slow and unpredictable. For many with no shortage of time, that is part of the fun.
Angkor Wat is a wonderful area with too many temples to count. The most famous spots in Angkor Wat are the Temple of Angkor Wat and, in Angkor Thom, the Bayon Temple. You can explore Angkor Wat with either the Little Circuit or the Big Circuit. Bikes are a fun way to get around, or tuk tuks are readily available for hire. Many people purchase a three day pass and spend the first day doing the Little Circuit with a tuk tuk and the Big Circuit the following day with a rented bike. The area is generally flat and bike riding is relatively easy, until the evening when traffic is very congested and navigating on a bike can be somewhat scary. There are electric bikes available, but these are generally not recommended as they are unreliable and often break down, leaving you stranded in the most remote areas.
The nightlife in Siem Reap is driven by the tourist crowds and there is no shortage of bars where you can relax, grab a drink, and chat with fellow travelers. It's not an authentic Cambodian experience, but it can be fun nonetheless.