Beech Street tunnel is generally a rather uninspiring and polluted space, taking pedestrians and vehicles underneath the Barbican complex. Unless you're using the bus stop, you're unlikely to want to linger. However, for a couple of days, people were queuing to get in!
On 17 and 18 March, the tunnel was closed to traffic and became the venue for a sound and light installation, Tunnel Visions: Array. Sheltered from the snow falling outside - if not from the freezing temperatures - the audience experienced a half-hour show. Contemporary classical piece Karawane, by Esa-Pekka Salonen, played as banks of projectors played a digital artwork across the tunnel ceiling and walls.
For the length of the performance, the space was 'animated' by art as the organisers intended. Unfortunately, it's not an effect which can survive the return of traffic; but for a few hours, the tunnel was truly transformed.