A guided walk from Theddlethorpe Village Hall car park to All Saints' Church, for a tour around the spectacular medieval church known as The Cathedral of the Marsh.
Those that don't want to do the longer walk can meet the group at the church.
Local experts will lead a tour around the church, which still has original features dating back to the 12th Century. They will point out lots of fascinating hard-to-find details such as the old graffiti depicting sailing ships, the remains of coloured paint on the carved wooden screens, the remains of medieval glass that survived the time of Henry VIII's reformation, and many more details that help tell the story of this remarkable church throughout the centuries.