I was just reading an alert about a stream-side invasive known as "giant hogweed" and it sounds like lovely stuff. The state of Maine calls it "Queen Anne's Lace on steroids"
Apparent it produces a toxic sap and contact with leaves or stems "can cause severe skin and eye irritation, painful blistering, permanent scarring and blindness."
It's probably a good idea to be able to ID and avoid
Giant Hogweed - NYS Dept. of Environmental Conservation