Dude, unless you live in a truly tiny town, you haven't seen all of your town. There is always something new to explore.
Heck, just consider how many towns and cities are built upon the ruins of older cities, in increasingly deep strata. Exploring those buried ruins has been a subject of archaeology and currently, urban spelunking.
Urban exploration - Wikipedia, the free encyclopedia
In the OP's case, perhaps that tiny town was once the seat of an evil empire whose name has been carefully and methodically erased from history...but the evil has reawakened and its calling out to those descended from its former servants...
Heck, just consider how many towns and cities are built upon the ruins of older cities, in increasingly deep strata. Exploring those buried ruins has been a subject of archaeology and currently, urban spelunking.
Urban exploration - Wikipedia, the free encyclopedia
In the OP's case, perhaps that tiny town was once the seat of an evil empire whose name has been carefully and methodically erased from history...but the evil has reawakened and its calling out to those descended from its former servants...