Found this structure today

[Always_Seek_The_Treasure]

Any ideas as to how old this structure could be, or what it might have been used for? It's about 6x10 feet with small square holes about 2 feet apart.

 

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[CASPER-2]

USUALLY FOR A SHED OR GARAGE - maybe late 1800s early 1900s

 

[RustyGold]

Interesting foundation picture. Possibly square holes to place floor joists or ventilation.