What are the cooler spots on the sun called?

on a cabin, which was on a boat, (that looked like a paper cruise), we were all on a trip and an example of one word to describe it was 'amazing' as we all had a party (almost like the one i had previously had at a house of my friend's) and we played games with a bag, a box and a letter!

sorry, i could only think of one sentence, check it before you use the sentence because it is important that it is up to your standards.

i would say the correct answer is not concrete.