Overlooking the intersection of Eastcheap, Gracechurch and King William, near the Monument to the Great Fire of London.
The top third of 30 St Mary Axe and a random brick wall. The famous building is on the land previously occupied by the Baltic Exchange building before it was destroyed by an IRA bomb in 1992.
Access walkways in the Tube: not like the tiled pleasantry of the Métro, utilitarian at best.
Looking back up Regent Street toward Piccadilly Circus before heading along Pall Mall to Trafalgar Square.
Baker Street Station and the famous Underground roundel (as perfected by Edward Johnston; font geeks note, the same Johnston responsible for the Johnston Sans typeface which subsequently inspired Eric Gill's design of Gill Sans).