An anonymous group has set up a post box and invited people to send a letter to themselves in the future.
The team, which calls itself LVN, first laid out flowers on Elvet Bridge in Durham on Thursday, June 2, offering blooms to cheer people up on their way to work or classes.
Now it has returned to the city again, making a promise to those taking part that their letters will be sent back to them on a date and location they specify once posted through a box set up in the Market Place.
A spokesman said: "The customised version of the famous red English postbox has been popping up around the town centre, allowing students and locals alike to post letters, inspiring
them to follow their dreams.
"Whether it’s giving up smoking or chasing your dream job, local people are being encouraged to put it down on paper.
"We want to liberate people from the shackles of ordinary living. In giving everybody the chance to write a letter – an ancient and highly personal form of communication – to themselves, we are providing a new way of living your life, and of talking to yourself.
"So often we forget to express our hopes and aspirations, but we want to allow people to do exactly that."
The red post box has Facebook and Twitter pages dedicated to it which inform people of its next location as it moves around the city.
The group added: "With scores of people posting letters, social media has allowed this project to spread and reach an increasing number of people."
Read more about the floral project here.