Question: things to do in niagara falls indoors?
Answer: Niagara Power Vista Center. So, you've seen the water thundering over Niagara Falls, but did you ever wonder where all those gazillions of gallons go? ... 
Aquarium of Niagara. ... 
Herschell Carrousel Factory Museum. ... 
Cave of the Winds. ... 
Old Fort Niagara. ... 
Fashion Outlets of Niagara Falls USA.