London is a major tourist destination known for its four world heritage sites, royal parks, and iconic landmarks along the River Thames such as the Houses of Parliament, Tower Bridge, Tower of London, Westminster Abbey, and Buckingham Palace. It is also home to famous institutions like the British Museum and National Gallery as well as numerous shopping, entertainment, and nightlife venues in West End. The document provides photos of various landmarks in London such as Big Ben, Tower Bridge, London Eye, St. Paul's Cathedral, and more to illustrate the city's many attractions.