Chapel of the Trees
Funk's Grove is south of Bloomington-Normal; just take I-55 south and follow the signs. Besides being an active production point for maple syrup (or sirup, as they spell it), it is a place of quiet and so a place to come and think. The Chapel is available for weddings but there is also the Chapel of the Trees for an outdoor ceremony.
Either Chapel is normally open and offers the quiet and solitude we all need.