Fantasyland & Tomorrowland. All of the rides are not necessarily running right away they seem to come online as the hour progresses, we find it a great time for Star Tours, Matterhorn, Nemo, often we go to one ride & find it not running yet so we just walk to another- everything is really close! Peter Pan is popular to hit during this time, often you can practically walk on the other "dark rides" during this time. We managed to hit Alice one morning when it first opened during this hour and waited only a couple minutes!