A newly-build police custody unit in Carlisle is holding an open day on Sunday for members of the public prior to it becoming fully operational.
Volunteers will be locked up to raise money for charity
There will be guided tours around the cell blocks where volunteer "prisoners" will be raising money for charity.
Police vehicles, including the safety camera van, will also be at the site.
The complex at Durranhill is part of a £4.5m project to replace the former police station in Rickergate, which was destroyed by flooding in January 2005.
Chief Inspector Gary Slater said: "The building should act as focus for a community sense of safety and this is a good opportunity for local people to see what we have achieved.
"Police officers and staff have been working, with good humour, in a difficult environment for some time.
"This is a key milestone that will alleviate some of the pressures on our staff and partners."
During the open day there will also be an opportunity to learn about some of the work done by criminal justice agencies.