Treasure trove, literally means “treasure that has been found”. The term treasure trove is often used metaphorically to mean a “valuable find”, and hence a source of treasure, or a reserve or repository of valuable things. The term is also often used metaphorically.– https://en.wikipedia.org/wiki/Treasure_trove
Now this, may not be considered as treasures to many. BUT to me, it brought out troves of loving memories that I had of my childhood.
My late father was a handyman. There was nothing he could not repair around the house. He had this heavy duty military type toolbox where all his previous tools were kept inside. He made sure to keep every tool well oiled and in good working conditions. Anybody who uses it without putting it back where it belong, will be given a good lashing. That was how precious those tools were to him.
I was trained by him to recognised each and every tool in that box.