Rumble aboard The Underground train as it rolls through a historic mining haulage tunnel. Push up your sleeves at our Gold Panning Pavilion and keep what you find! Immerse yourself in the award-winning, live-action, multi-sensory experience of BOOM! Learn about minerals, the copper extraction process, and what life was like back in the day as the 101-year-old historic Mill No. 3 building is brought back to life! Britannia Mine Museum opens up a little-seen world that fascinates all ages, offering awe-inspiring sights and memorable family experiences. Take a step back in time at this award-winning attraction and National Historic Site. Located along the beautiful Sea to Sky corridor between Squamish and Vancouver.