Greenwich Park and Royal Observatory, late afternoon. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35891.html Daffodils on hillside, Royal Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35889.html Flamsteed House designed by Christopher Wren, Royal Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35890.html Royal Observatory, the first purpose-built scientific research facility in Britain. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35883.html Shepherd 24-hour gate clock, and public standard of length, Royal Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35886.html Royal Greenwich Observatory and daffodils. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35879.html Royal Greenwich Observatory, late afternoon. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35888.html Old Royal Naval College, Queen's house, and Royal observatory with laser marking the Prime meridian at night. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35908.html Greenwich meridian, or Prime meridian, the basis of Longitude, Royal Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35887.html Royal Greenwich Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35880.html Royal Observatory. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35878.html Flamsteed House with the Red Time Ball. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35882.html Red Time Ball on top of Flamsteed House, one of the world's first visual time signals. Greenwich, London, England, United Kingdom http://www.terragalleria.com/europe/london/maritime-greenwich/picture.uken35881.html