Join the City of Jacksonville, MOSH, and the St. Johns Riverkeeper for this Public Day at MOSH with FREE admission sponsored by the Environmental Protection Board of the City of Jacksonville.  Guests will celebrate one of our most precious resources, the St. Johns River, as they enjoy activities, presentations and guided boat tours along the St. Johns River (first-come, first-served) from 10 a.m. to 4 p.m.