On the United States side of Niagara Falls, some of the best things to do include: 1. Cave of the Winds: Experience the power of the falls up close with a journey down to the base of Bridal Veil Falls. 2. Maid of the Mist: Hop aboard this iconic boat tour that takes you into the heart of the falls. Feel the thundering roar and witness the magnificent beauty from a unique perspective. 3. Niagara Gorge Trail: Hike along this scenic trail, offering breathtaking views of the Niagara River and its rapids. 4. Observation Tower: Head to the Observation Tower for panoramic views of the falls and the surrounding area. 5. Whirlpool State Park: Explore this picturesque park featuring the mesmerizing Niagara Whirlpool. Take a hike along the trails, enjoy a picnic, or simply relax in the serene atmosphere. Don't forget to experience the Rainbow Bridge, connecting the US and Canada sides of Niagara Falls. It allows you to enjoy the beauty and attractions on both sides of this natural wonder.