<human>:  I am planning a day trip to Niagara Falls this weekend. What are the must-see places to visit?
<bot>: Some of the must-see places to visit at Niagara Falls include the American Falls, Bridal Veil Falls, and Horseshoe Falls. You can also stop by the Cave of the Winds, which is a scenic viewing platform, and Niagara Falls State Park, the oldest state park in the United States. There's also the Niagara Skywheel, a 175-foot-tall observation wheel, and Niagara Aquarium, which is full of sea life. Be sure to take a boat tour to get a close-up view of the falls.