Nope no licence needed for Indiana, if you go to the Indiana dunes you have to have a permit from the park ranger on site, then of course you can only hunt a certain time of the year and only the part of the beach to the left of the bath house. But the rest of what you want to hunt there is cool, with Private property always ask permission from the owner, try to get it in writting! whats good is old maps, Platte maps of your area or all of Lake county, find where there were old schools, up there on Hohman ave just north of down town Hammond is the over pass, on the east side of the over pass is a large empty lot with weeds and trees just before you get to Michigan st., that is where the Hammond library was back in the late 1800's, also Harrison park and Pulaski ( originally Douglas park) park have been around since the late 1800's as well and contain very old silver and other relics, you just have to do some research and find out were people gathered in the park, Harrison park use to have a footbridge that went over the pond on the north end, and there were boats, baseball games were a favorite as well, at that park I would concentrate my search along the shores of the pond and work my way out, Pulaski park has had a football field on the north end of the park for many many years, my oldest find at that park was a 1916 mercury dime, and that was about 12 years ago, I was still getting to know my detector, plus it a big park I meandered around, check around big trees, plus there was an old entrance road that entered the park from the southeast that headed to the northwest, it was still visable when I was there, oh yeah I also remember finding a Susan B. Anthony $1 coin in the soccer field on the east side of the park. The important thing though is research, Hammond use to be alot different back then than it is now, find the old sites, then seek permission, hit those park with full force, and check out the old library site, there are a lot of sites, you just have to learn how to find them! Good luck, QUICKSILVER(appletree)