these previously buried treasures are fondly called yardifacts here
There's an area where my hens are now free-ranging that was covered in undergrowth and they have unearthed a pile of slate, a big heavy round steel "thing" and all kinds of other interesting things. I'm going to decorate the orchard shed/hen house with the treasures.
After my place being a rental for 30 years our yardifacts all seem to be garbage. They burned and dumped. Anyone interested in old rusty cans, broken bottles???? GRRRR. I will never be a long distance landlord again. Even with a manager we got scr***d. No one love your stuff like you do.