The first 15 mile stretch from Derby through to Matlock Bath was awarded World Heritage Site status in 2001.
The UN has been told that mass tourism is endangering the citadel, which was made a world heritage site in 1983.
The Cathedral, which dates to the 12th century, is a UNESCO World Heritage Site and widely considered to be the finest examples of Gothic architecture in the world.
Today he's a kind of living embodiment of the form, a sort of one-man world heritage site.
The bay is a UNESCO World Heritage Site with over 3,000 limestone pinnacles & islands that emerge from its emerald green waters.
