If you choose to venture a bit further away then there are the cities of Salisbury, Bath & Bristol and many other towns to explore.
This list of attractions are all within a reasonable distance from Devizes - they open up in their own websites.
a'Beckett's Vineyard Littleton Panell
Atwell-Wilson Motor Museum Calne
Bowood House and Gardens Derry Hill
Cherhill White Horse and Monument Calne
Lacock Abbey, village & Fox Talbot Museum
Royal Electrical and Mechanical Engineers Muesum Lyneham
a'Beckett's Vineyard Littleton Panell
Atwell-Wilson Motor Museum Calne
Bowood House and Gardens Derry Hill
Cherhill White Horse and Monument Calne
Lacock Abbey, village & Fox Talbot Museum
Royal Electrical and Mechanical Engineers Muesum Lyneham