"Each year we reconfigure our track a little bit differently. We want to make sure that no matter where you are in the show, you can admire the trains. Sometimes they might be overhead on the bridges, sometimes they might be at eye level, sometimes they might be down below. That way, whether you are young or older or very tall or very small, there's a train that you can see kind of right at your level," said Joanna Groarke, director of public Engagement and library exhibitions curator at the botanical garden.