Big Ben is the nickname for the great bell of the clock at the north end of the Palace of Westminster in London though today the name also refers to the clock and the clock tower. The bell weighs almost 14 tons and each clock face is 23 feet in diameter. It became fully operational on September 7th, 1859 and is today one of the most prominent symbols of London standing at 316 feet high. The clock requires winding three times per week and pennies are periodically added or removed from the clock of pendulum to maintain its accuracy.
The Sago Palm Tree (Cycas revolute) is often called a “living fossil” because it is one of the most primitive seed plants alive today. Its origin traces back to ancient flora of the Mesozoic era more than 200 million years ago. It is easily recognizable due to its distinctive whorled feathery leaves.
London Bridge refers to several bridges that have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge constructed from concrete and steel. It replaced a 19th-century stone-arched bridge, which in turn superseded a 600-year-old medieval structure. This was preceded by a succession of timber bridges; the first was built by the Roman founders of London.