The Chunnel, as the 31.35-mile tunnel under the English Channel is known, opened in 1994, connecting Calais, France, with Folkestone, England. It is the second-longest tunnel in the world (behind Japan’s Seikan railway tunnel), and has the longest underwater section of any tunnel. The Eurotunnel Shuttle is a special vehicle transport train that has the largest rail cars in the world.
Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.