Favorite thing: After the falls and the gorge, the Pigeon River broadens as it nears Lake Superior. It helps explain why 19th century mapmakers thought that this would be a fine "boundary" between countries. If you are going to have borders, they might as well be rivers (they make more sense to me than arbitrarily imposed straight lines.)
Favorite thing: After the dramatic waterfalls, the Pigeon River enters a deep gorge. It becomes very understandable why native americans and the voyageurs realized that it was essential to "portage" their way around this part of the river! At points, though, the river is quite narrow, only a few yards wide - although the cliffs on the Canadian side would make crossing the stream here quite difficult, I imagine.
Part of Grand Portage State Park, Pigeon River is (I believe) the tallest waterfall in Minnesota. Though in fact it is only partially in Minnesota, because in forms the boundary with our neighbors to the north, Oh Canada.
There are actually two separate drops, making for a combined "drop" of close to 300 feet. The parking area for the falls is just inside the US boder, and there is pleasant paved trail - about 3/4 mile - to the viewing platforms.
Favorite thing: The viewing platforms for the Pigeon River Falls are well constructed of wood planks and are maintained by a local trails association.