Spectacular 20ft-plus tall rainbow-coloured arcs are heading to The Leadenhall Building (aka the Cheesegrater) in the City of London, bringing joy to some of the darker months of the year. Elysian Arcs is a free outdoor immersive light and sound installation created by award-winning design studio, Atelier Sisu. The Arcs have been commissioned by the Eastern City Business Improvement District (EC BID) and produced by FESTIVAL.ORG to help support the mental, physical and environmental wellbeing of workers in the City, following concerning trends in the mental health of young professionals in London. It may be grey and chilly outside, but for a few cheerful weeks your commute could be full of giant rainbows. What's not to love?