Fear Factory is one of the premier Niagara Falls Attractions located in the Clifton Hill Tourist District. (5621 Victoria Ave. Niagara Falls Canada). This haunted house is quite possibly the scariest haunted house in North America guaranteed to give you nitemares. Witness the haunted halls and ghost sightings in this 2X Niagara Falls Attraction of the year. The World Most Frightening Experience. Located on the top of Clifton Hill across the street from Casino Niagara. 5 minute walk to Niagara Falls and minutes away from the top 10 things to do in Niagara Falls.