He's an expert and a true BP treasure trove of insight on this exact topic

I heard from another investor that Bigger Pockets was a treasure trove of knowledge. 

One who saves and stores all treasures, be it money, information, contacts, lessons, etc.?

It is the local real estate association website - it is treasure trove of information. 

I have been running into for the past year homes I find vacant/abandoned, know home is a good rehab project, find out who the owner is (assessors site) plus viewed treasurer site to see who is "paying" the taxes currently and after all that work to the point I actually find this owner, the owner tells me he/she "let the home go into default" or in other words, just walked away from the home with a outstanding balance owed to the lender.Well, I have come across a home in Merrillville, IN that is a 3 bed 1.5 bath and is in a nice area of Merrillville but in need of real work; be a good wholesale if owned free and clear... took all the steps I know of and found the owner.

I have been running into for the past year homes I find vacant/abandoned, know home is a good rehab project, find out who the owner is (assessors site) plus viewed treasurer site to see who is "paying" the taxes currently and after all that work to the point I actually find this owner, the owner tells me he/she "let the home go into default" or in other words, just walked away from the home with a outstanding balance owed to the lender.Well, I have come across a home in Merrillville, IN that is a 3 bed 1.5 bath and is in a nice area of Merrillville but in need of real work; be a good wholesale if owned free and clear... took all the steps I know of and found the owner.

Start to lookup the address and found out that it was foreclosed 2 years ago for several thousand $$ and will be auctioned at a county treasurer trustee auction because of 3 years past due property tax.The county's record shows the deed recorded from the owner to the county 2 years ago, 3 minor liens by the waste disposal company and then there is no more record. 

@Chris BenitezBP is a treasure chest full of resources.

Also, is this your sole source for tax defaulted land, or do you use it in conjunction w/ lists from the county treasurer's office?

@Nicole RojasBP is a treasure chest full of useful resources.