We took a trip to our local island park in Eaton Rapids, MI and found two cannon on display, a 1864 Parrott and a 100lb from 1862.
I hope these pics come out:
The Parrott:



For scale (With me and an XD 3inch for comparison)

The 100lb:



Introducing a 20 pounder to cannon at an early age...


I hope I haven't crippled someone's dial-up modem
David