Noxious
Heracleum mantegazzianum, aka giant hogweed, was introduced to England in the 19th century as an ornamental plant. It has since spread to Australia, New Zealand, USA, Canada... It's highly invasive and the leaves and stalks can cause skin rashes. The sap can make you blind. And here it is choking the river bank.
Some jurisdictions require you to notify the authorities if you see it.
As pretty as it is, don't handle it.
Noxious
Heracleum mantegazzianum, aka giant hogweed, was introduced to England in the 19th century as an ornamental plant. It has since spread to Australia, New Zealand, USA, Canada... It's highly invasive and the leaves and stalks can cause skin rashes. The sap can make you blind. And here it is choking the river bank.
Some jurisdictions require you to notify the authorities if you see it.
As pretty as it is, don't handle it.