Queen Elizabeth Olympic Park is the main legacy site of the London 2012 Olympic and Paralympic Games. The park includes landscaped waterways, public art, sports venues, playgrounds, and the ArcelorMittal Orbit, whose slide is the most conspicuous visitor attraction.
It is worth a deliberate stop if you are interested in modern London, Olympic architecture, or family-friendly open space. The park is large, so pick a route rather than trying to see every venue.