So many different pretty oak trees turning colour and producing acorns in autumn. Some autumn foliage will be bright red or red or orange or yellow or not changing colour so it will eventually dry out and become brown.
In some culture, acorns are used as food, eat as nuts for emergency or dried, grind into powder, get the starch with water cook in short time and can make jelly like tofu, with sauce, it is nice and special! I have tried few times.
Some countries their culture believe eating acorns are good for your health–perhaps because of the mighty oak lives strong and long?