Bicycles are an option, though you will spend more time getting from place to place and will have a limited range. They are probably best for visitors planning on returning for several days. Bring sun screen...
Passes are required to enter the Angkor area. They are on sale at the front gate for 1 (US$20), 3 (US$40), or 7 (US$60) days. The 3-day pass is valid for a week, while the 7-day pass is valid for a month. Ca...