Tunnel One at the Coal Loader is a refurbished former coal-loading tunnel beneath the historic Waverton platform, with a distinctive 180-metre length, narrow passage and adjoining side chambers. North Sydney Council hires the space for exhibitions, installations, filming, awards and selected private events, and says entry is available by lift or stairs from the platform. Bathroom facilities are on the broader Coal Loader site rather than inside the tunnel. Capacity depends on event type; council’s current page does not give a single universal maximum, so the older guide figure of 150 should not be treated as automatically approved for every layout. Hirers must propose an event plan and arrange equipment.