I was in vacation with my family in Mexico, we were in a cenote enjoying the refreshing waters, and i decided to take a bit of heights to take a picture showing the array of sun coming through the cave, creating this deep natural contrast (not modified in post prod). this is one of my mom favourite. the parameters i took the photo with are : 42mm; 1/320 and f5.6
(btw the little black dots in the water are fish)