The G.A.R. Hall’s Auditorium features many historic artifacts, including:
- The original charter from the Grand Army of the Republic
- A portrait of George L. Waterman for whom this G.A.R. post was named
- Portraits of Abraham Lincoln
- Original paintings by the G.A.R. members
- Photographs of Peninsula throughout its history
- A grand piano that belonged to the Waterman family
- The original insurance policy taken out by H. Bronson when this building was originally built as a school house