The main temple at Angkor Wat is a quite spectacular place; together with the many other ruins at Angkor, it's a world-class historical site. For a short but informative introduction to Angkor, you could try this
History Channel webpage, and for a longer, temple by temple guide you should read the online guide at
www.canbypublications.com, which also has a handy area map. Like many VT contributors, I'm putting all my tips for the various Angkor ruins in this location for ease of reference.
However accomodation and many other facilities are available at nearby Siem Reap - see my
Phumi Siem Reab (Siem Reap) page for my tips on the town.