In 1998 I got up early, most of my companions still sleeping off the night's hell raising, grabbed my camera and walked out to the little spectator mound at the bottom of the hill (at the entry to the Esses) looking back up the straight to the Dunlop Bridge, and watched the sun come up. Shot a roll of film (yeah, that long ago), and the best shot I ended up with was that of the eventual winning Porsche, having just popped out from under the bridge, coming down the hill in the bright morning sun (not much of the usual fog that morning), the hillsides totally deserted but for a few hearty souls. Sadly I don't think that vantage point is there anymore, but it is such an evocative memory.
As Dottore said, sunrise at Le Mans, and sunset at Sebring are amazing.
Fax