Visible from much of the town centre, Jumbo is a vast 1882 brick water tower designed by Charles Clegg with thirty-foot cast-iron columns and a wooden cupola perched on top. At over 100 feet high it is the largest Victorian water tower in Britain, holding 230,000 gallons in a great iron tank above what is essentially an enormous stone shed.
Decommissioned in 1987 and empty for decades, Jumbo has been the subject of long-running redevelopment proposals to convert it into a viewing tower or apartments. For now you cannot go inside, but it is worth walking down Balkerne Hill to look up at the structure from below — the scale is astonishing and the wedding-cake silhouette is the defining oddity of the Colchester skyline.