I think you need to say which Queenstown to make it easier for someone to help.
Queenstown is the name of several places in the world including:
Queenstown, Blackpool, Lancashire, United Kingdom
Queenstown, Eastern Cape, South Africa
Queenstown, Maryland, United States
Queenstown, New Zealand, a resort town in Otago, New Zealand
Queenstown, Singapore, a neighbourhood of Singapore
Queenstown, South Australia, a suburb of Adelaide
Queenstown, Tasmania, Australia
Queenstown, Wisconsin, United States
Cobh, Ireland, was called "Queenstown" between 1849 and 1922
Queenstown was the original name of Port Clements, British Columbia, Canada
Queenstown was the original name of St Andrews, Victoria, Australia
Queenstown was the original name of the City of Victoria, Hong Kong
Queenstown was the original name of Queenston, Ontario, Canada
Also say where Mitchellstown is. I could only find a Mitchelstown in Ireland.