London is the capital of Great Britain and one of the most interesting places in the world. It has over 8 million residents and many famous landmarks, including the River Thames spanned by bridges like Tower Bridge. There are hundreds of places of interest in London such as the Tower of London museum, Big Ben clock, and beautiful churches like Westminster Abbey and St. Paul's Cathedral. The city also has lovely parks and gardens, including Regent's Park which houses one of the largest zoos in the world.