Plan your visit Facilities Biffa Award Gallery Explore our Biffa Award Gallery and discover an interactive exhibition that will whet your appetite for heading underground into the tunnels and caverns, you will also get a feel for all the work that took place in the 1960's onwards to help save this unique place and environment. Tips to make your trip more enjoyable. The Biffa Award Gallery is free to visit - you don't have to have a boat trip to visit us. Take a selfie with Fluffy and post it on our Facebook page - we love to see them. Families with young children or people who are familiar with Makaton symbols and signs might enjoy our free makaton exhibition trail - just download it from our website. Make sure you also check out our Tunnel Treasures exhibition which has a changing program of displays and exhibitions.