30 St Mary Axe, London. The 'Gherkin', a curvilinear 40-storey office building in the heart of London's financial centre. Distinctive tapering form that minimises its footprint and effect on the London skyline and ecofriendly glazed skin with lightwells, the building also has a glazed dome at the top with spectacular 360 degree views across the city. RIBA award winner 2004. Architect Foster and Partners 2003.