Hey Mink, Welcome aboard!
Sounds like a great possibility for finding some really old stuff.
First of all.....Danger!!!!!........Watch out for any old wells in the area. Many times they are right up next to the foundation. They can also be a good place to find some goodies.
Is it in a wooded area? When was it last inhabited? You may have to do some probing with a long metal rod. Also, if you have lots of time to work the site you may want to do some screening of the soil.
Good luck!..........HH