Zeusthecockapoo
I can't really recommend visiting Fort Willow just for its own sake. It's an interesting historic landmark for sure, but quite sparse in terms of things to actually see. Sadly none of the original War of 1812 buildings are still standing. The walls of the fort have been rebuilt and there are also logs marking the outlines of the former buildings. I'd say spend a day exploring the Minesing Wetlands and make this one of several stops along the way.
Carriehough76
There is not a whole lot there building wise, but nice feel of history and quiet area for a quick walk