Another coin joins the "Tiffany Art Metropolis" series. This series presents urban landscapes of the world's largest metropolises.       This time, the coin's reverse features a bird's-eye view of the British capital London. It highlights such landmarks as Buckingham Palace, Big Ben, the British Museum, the Tower of London, St. Paul's Cathedral and the Shaftesbury Memorial fountain. The obverse, on the other hand, features one of the most famous bridges in the world - Tower Bridge. The coin is decorated with a glass insert imitating the Thames River.     London is the capital and largest city of England and the United Kingdom, located in the southeastern part of the country on the River Thames. It is the third-largest city in Europe, and one of the world's largest cities, both on the scale of the city itself and the entire metropolitan area. Modern London is the world's second largest financial center. 30% of the world's currency trading and 40% of the world's eurobond trading takes place there.