Some thirty years after the Great London Exposition took place, Edinburgh hosted its own presentation. Between the months of May and October 1886, The Meadows was home to an exhibit showcasing Scottish advancements in Art, Science, and Industry. This trade fair attracted nearly three million visitors to the capital city. Over 100 years later, there would be little left to remind future generations of what once took place at this location Fortunately, at the westerly end of Melville Drive stands two 26 foot pillars, each topped with seven-foot-tall unicorns, the…