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24 April 2015 Last updated at 22:16 BST
The constituency includes England's smallest city and its 12th Century cathedral, Glastonbury - famous for its music festival - the Mendip Hills, Cheddar Gorge and the Somerset Levels.
BBC reporter David Garmston finds out more about this constituency, won by the Liberal Democrats in 2010 and which the Conservatives have declared as a target seat for 2015.
Wells is a large, mainly rural Somerset seat stretching from the Bristol Channel in the west, to Shepton Mallet and Glastonbury in the east.