30 St Mary Axe (widely known informally as The Gherkin and previously as the Swiss Re Building) is a commercial skyscraper in London's primary financial district in the City of London. Has a great little restaurant on the ground floor.
On to England! Big Ben - is the nickname of the Great Bell of the clock at the north end of the Palace of Westminister in London, England. Iconic and what England is most known for, so the Big Ben is a must see.