No other English city had parts of a national park within its boundary , until the creation in March 2010 of the South Downs National Park , part of which lies within Brighton and Hove .
Roughly a third of Sheffield lies in the Peak District National Park .
No other English city had parts of a national park within Sheffield 's boundary , until the creation in March 2010 of the South Downs National Park , part of which lies within Brighton and Hove .
Roughly a third of Sheffield lies in the Peak District National Park .