This was developed specially for the 2012 Olympics held in London. Previously the area was mainly used for run-down, low quality, industry. Part of the area was covered with railway sidings, used for the parking of suburban trains overnight. Very few people would have even passed through there, unless delivering old car and truck tires for storage, or such like.
In the years leading up to the Olympics the area was completely transformed. Low lying parts which were boggy and subject to flooding were raised up by massive piles of earth which had been excavated to build the Eurostar train line which was tunnelled directly underneath.
The Lee River and canals were thoroughly cleaned up, and extensive planting of lawns, shrubs and trees took place. The park was one of the greatest attractions of the Olympics, with many visitors for events at the Stadium, Aquatic Centre, Copper Box, Velodrome, and so on.
A few months ago the park was reopened to the public, and I often wander around different parts. There are lots of attractive plants, and an amazing variety of types. There is even a wetlands area for plants which need ponds and damp soil to grow in. There are extensive gravel paths running the length of the park, so it is easy enough to walk the length of the park, although you are perfectly welcome to wander around the grassy areas as well.
Perhaps the most distinctive feature of the Olympic Park is the Orbit. This towering curling structure, painted a rich red, overlooks all of the park, and there are good views towards the business hub City of London, as well as Canary Wharf. And on the eastern side of the park there is the massive Westfield Shopping Centre, currently the largest urban shopping centre in Europe.
For visitors to London it is very easy to get to Stratford. Probably most will use the Central or Jubilee underground train lines. However there are also platforms at Stratford station for Dockland Light Railway and Overground trains.
There are sure to be further posting about the Olympic Park in the future, examining in greater detail particular features of this wonderful park.
This video will help to give you a better visual impression -