Elmira, Ontario. Working chemical plant on the east edge of town (North is to the left). I don't know who runs it now - it's changed hands several times in the 25 years we've lived here.
At the top left of the picture you can see part of the building that was built to hold the many, many barrels of toxic soil dug up during site remediation in the 80s & 90s, until another place could be found to deal with that stuff. The building is at the top of a slope down to the creek, which used to be a source of drinking water for the town (um, not any more). For 15 years I worked in an office overlooking the parking lot and the plant (a corner of my building is barely visible along the bottom edge).
Claim to fame: back in the day, it produced... Agent Orange. Yup. Also, on the day of Reagan's funeral, it almost blew up. We spent the day "sheltered in place" in our basement with the windows closed, until the fire was put out. Ah, good times!