From mid-April to early June, white flowers bloom on top of these gigantic
saguaros. The prime time is usually around the middle of the season (May).
But even the location of the white flowers at the lower arms of a saguaro is
way beyond the human eye level.
Thus, it takes two ladders to take the close-up pictures. One person
climbed up a ladder to hold a reflector while the other person took the
shot on another ladder. We made sure that the ladders were stable,
otherwise, falling into cactus would like going through acupuncture.