Documentary venturing behind the doors of one of the greatest museums in the world.

Documentary venturing behind the doors of one of the greatest museums in the world. Every year, five million people visit London's Natural History Museum to see its incredible collection, from extraordinary dinosaurs to giant whales, and rare fossils to space rocks said to be as old as the solar system itself. But only a fraction of the staggering 80 million items in the collection are on display. Here cameras capture some of these incredible specimens, revealing the unique and rare pieces too valuable to exhibit.