"Sparkles" in dungeons/caves/areas of TBOL game

My traveling party was attempting to find Alex (a female character in this game) and I have noticed several spots/areas in the game whereby "sparkles" appear in the background. Naturally, I walk my party over to these "sparkles" and click on them ... thinking that maybe there is a hidden room, or a hidden object - but NO ... there is not!
Can someone tell me what these "sparkles" are signifying? Thanx for your help.
Can someone tell me what these "sparkles" are signifying? Thanx for your help.