If you can, go over to the Canadian side at Niagara Falls. The entire side along the river road and around the Falls is a provincial park and is the site of the Ontario Gardening College so the students have lots of area to practice on. The rose garden is beautiful and in the spring thousands of daffodils and tulips are on display. There is a tunnel that takes you under the Falls and opens up to the water flow. You can easily spend a day there, either spending a little or a small fortune. I grew up close to there and spent many Sunday afternoons in the park. Don't forget your passport if you plan to cross.