A large area with several temples, Stupas, buildings and important places spread over it. Worth the effort to go, but a guide is a necessity as otherwise you are just looking at domes, trees, fallen down buildings and water. The guide can make or break it, ours was excellent. The car is a bonus as it gets so hot - cycling would be difficult and walking impossible (unless you just want to see the temple used today the the Bo tree).
This review is the subjective opinion of a TravelPod member and not of TravelPod.com.