Immediately south of the Horse Guards Parade and normally monumentally reticent is Sir Gilbert Scott’s great building for the Foreign Office which ended up being a victory for the Neo-Renaissance in the Battle of the Styles after Lord Palmerston rejected the first gothic designs:-

High up is some rather fascinating sculpture, hard to identify from a distance and even harder as it is not described by Pevsner.   It turns out that the corner of the building is guarded by two river gods, both heavily bearded, one representing the Indus, the other the Ganges:-