A few years back, Amy was visiting me in the Twin Cities, as I had recently moved there. I decided to take her to Minnehaha Falls, which is a great park in Minneapolis that happens to also have a waterfall.
During the summer it can be quite the busy park, but it is always worth the trip. Not only does it have a waterfall, but also scenic trails, overlooks, and river views. It is one of my favorite places in the Twin Cities.
We took our dogs too, as it is a super pet friendly park. Dogs can go on the trials, as well as run around in the large dog park.