There are many claims to both national and international importance in this remarkable region… but it is Upper Teesdale’s High Force waterfall which, at around 21 metres, is not only England’s largest waterfall, but to many people is the most dramatic symbol of Teesdale. There are two falls here in wet weather… and on rare occasions one huge frightening boiling mass of water filling the gorge. Another rare occurence in severe winters is when the waterfall freezes into a giant icicle.