The sprawling Giant Hogweed plant, which can grow 6 meters tall and cause severe first- and second-degree burns, was seen in the historic town of Krosno in southeast Poland, next to a footbridge dubbed Lovers’ Bridge.

Sending out warnings on its website, town hall officials said on Monday: “A plant that poses a threat to human health was located on Parkowa Street (next to the footbridge) under the name Mantegazzi's hogweed.”

Introduced to mainland Europe from the Caucasus in the 19th century for decorative purposes, the plant, which can grow up to 5 meters tall, quickly spread.

According to experts, the recent mix of Poland’s hot and wet weather has caused the toxic plant to bloom earlier than ever.

Its sap can blister within 48 hours, often hospitalizing people and leaving them with permanent scars.

Krosno officials said: “It is a dangerous and invasive plant, so it will be removed as soon as possible.”