Regent Street separates Mayfair and Soho. The city's financial district dominates the London skyline. The Houses of Parliament building is one of the biggest of its kind in the world. The London Eye has over three million visitors a year. The London Gherkin is otherwise known as 30, St Mary Axe. The River Thames goes through the heart of the city. Warwick Castle dates back over a thousand years. https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_green.swf