The top floor, though, offers excellent views of the Barbican complex. That confusing layout, which requires extensive signage and a yellow track to the Barbican Centre when you're inside, makes a lot more sense when viewed from above.
St Giles Cripplegate, at its heart, is even more prominent - and incongruous - from here, too.
There is plenty more to see from this level. A look across the City highlights the extent to which the skyline is dominated by the newest skyscrapers - and by cranes.