Found great abandon property. what to do next?

[June Alexandrea]

I have been driving past this great vacant piece of property, I finally got out my car to look into the window.  There was no address, so I  I knocked on the door across the street. Just my luck it was a little old lady willing to get me some information about the house.  She told me the owner had passed away in February 2014 and that his niece was taking care of the estate, and she lives in Florida. She also gave me the owner name and his address because there was no mailbox or number on the house.

I have the property what do I do. First I call the county they just gave the information that I already had.  I am not sure if I can get his niece name or address. The little old lady did not have that.  So here I am with a good lead what should I do next?