Banks of the Loire, issued in 2007. The stamp belongs to the series Portraits de régions N° 9 - La France à voir.
As the River Tees comes hurtling down from its North Pennines source, it plunges about 21 metres over an almost vertical cliff. After heavy rain, the peat-laden river splits, forming two falls divided by a protruding buttress, but even this rock can be covered in exceptional weather. England’s most powerful waterfall in terms of volume, High Force is slowly moving upstream as it erodes the sedimentary rocks beneath the Whin Sill – the hard-wearing layer of rock over which the River Tees initially flows.
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