Nelson's Column was a London monument, consisting of a large pillar guarded by lion statues, commemorating Horatio Nelson.
In the alternate reality, it was close to the Kelvin Memorial Archive, though it at least its base seemed to have survived the 2259 attack on that facility well. In the direct aftermath of the explosion, John Harrison stole jumpship 208 while it was parked next to the monument. (Star Trek Into Darkness)
The monument was digitally inserted into the scene. [1]
The London Eye was prominently seen in the background of the monument. While less than a kilometer away, there is currently no clear line of sight to that landmark, a fact which seems to have changed as part of the extensive changes to the city between now and the 23rd century.