Set your watches for Greenwich, a Royal borough of London, that is literally located at the centre of the world - dissected as it is by the Meridian Line. The line neatly splits the globe in half and marks zero degrees on the map. Enjoy a stroll past the glittering lake and sniffing deer of leafy Greenwich Park, or settle for a quiet drink in a charming riverside pub as you enjoy London's quieter side, and the spiritual home of science and seafaring history. Britain has extraordinary heritage on the waves, and you can learn more of the era when Britannia ruled the waves at the National Maritime Museum. Another piece of maritime history has been raised out of the water, and proudly displayed here for all to enjoy in Greenwich. The Cutty Sark was one of the fastest clipper ships ever built, and you can climb aboard to steer the wheel of this spectacular, living piece of maritime history, which is now housed on the banks of the Thames. The celebrated Royal Observatory is a revered font of knowledge, which has been observing, studying and measuring the sea and stars since 1675. Divided by the Meridian Line, you can step between continents, as you explore this global centre of learning and science, which is the home of Greenwich Mean Time. The unmistakable white half-moon of the O2 Arena sits snuggly in a meander of the Thames River. Built to mark the arrival of the Millennium, the dome is now used as London and the UK’s biggest and busiest concert venue – hosting major entertainment acts on a nightly basis.