temples and partying
The city is interesting with the Angkor national museum and the circus, the gem is Angkor archeological park just a few kilometres north. The days are hot, so go early to explore the ruins. Pub street is pretty awesome at night with Angkor What and Temple Club keeping people moving all night long with cheap alcohol. A few little side trips to consider as well, but this place is best enjoyed in groups as tuktuks take you everywhere. Sharing them will keep expenses down.
Insider Tip:If you plan to bike the ruins, it is totally doable... But I'd recommend a mountain bike over the sqeaky $1 road bikes Stay on the southern side of the grand circuit for the most grand temples, though nice small ones are at the top. Take frequent breaks and drink lots of water. If you're not masochistic, each tuk tuk is $15 for the small circuit, $20 for the large circuit no matter how many pax. Go early to avoid seas of people. Tuk tuk rides within siem reap should cost $2 max per tuk tuk.