The Halo is an artwork in the form of an 18m-diameter steel lattice structure supported on a tripod overlooking Haslingden, positioned to be clearly visible from the M66 and A56 approach to Lancashire. Designed by John Kennedy and selected as part of a design competition managed by RIBA Competitions which was launched in 2003. It is lit after dark using low-energy LEDs powered by an adjacent wind turbine. It is the fourth Panopticon in Lancashire. It, and the adjacent landscaped area at Top o'Slate, was opened to the public in September 2007, and was designed by John Kennedy of LandLab and engineered by Booth King Partnership.