One of my favourite buildings is "the Erotic Gherkin" in London's financial area, City of London. It's actually called the 30 St Mary Axe.
The whole area of Bank is amazing, with lots of contrasts between old and modern buildings.
This is the view of the Gherkin from Brick Lane, I took it:
CONTRAST.JPG
And this is from the 30 St Mary Axe website:
This is at the very top of the building.