Niagara Falls and its surrounding parks see millions of visitors a year, and all that foot traffic results in a lot of trash—832 metric tons each year from the Canadian areas alone. Still, park sanitation workers were surprised to find a piano, broken into pieces, among the items left in the garbage one day. “People dispose of all kinds of things,” said Steve Barnhart, the senior director for parks, environment, and culture at the Niagara Falls Parks Commission in Ontario.