Whilst Angkor Wat is the largest temple around Siem Reap, there are many others some of which in my opinion are better. So you want to take some time and see as many as possible else you’re doing yourself a great disservice.
Angkor Wat Temple Pass
No matter how you decide to view the temples, you’ll need to buy a temple pass to let you in the area. These passes get checked on the road as you enter the temple complex and additionally by a guard before you enter each temple, do not lose it!