Number One: Always look up.
I’ve found that some of the most interesting things in the parks are above eye-level. At the very least, all chandeliers will be well above the average eye-level. More importantly however is the fact that many of the two-story of taller buildings in the parks have balconies, which often have lighting fixtures visible to guests.
Number Two: Don’t get tunnel vision.
While on a busy trip it might seem like there are never enough hours in the day, it’s important to look around, not just rush from Point A to Point B to Point C. As I said in my first point, often there are lights in harder to see areas. They’re in places you don’t see if you’re not looking for the details.
Number Three: Look for the shadows.
When you’re stuck in line, look at your shadows and the tint of the light in room. The location of your shadow can give you a good idea of where the lights in the area are, and the length of the shadow is also helpful. The longer the shadow, the lower the light. This step at least only works either indoors or at at night after the sun has gone down completely.