Countless natural history treasures are deposited in museums across the world, many hidden away beyond easy access. The OpenUp! project creates a free access to these resources, offering over one million items belonging to the world’s biodiversity heritage. The objects made available through OpenUp! consist of high quality images, videos and sounds, as well as natural history artworks and specimens, and also include many items previously inaccessible to visitors. Information provided through OpenUp! is checked by scientists and made available through the Europeana portal at www.europeana.eu.