I've always wanted to go to London, but a limitation is money and time, what I would like to know is the River Thames and alrededore as the London Eye or the London Bridge and the Parliament with Big Ben, also me I like to go to the royal palaces such as Buckingham, icons I have ever seen in English movies and series.
these places are all in the central and historic part of London, you can reach the station of St. James's Park subway alojarce not to close and go east to the palace and then back to the west to the River Thames walk along the shore, crossing bridges is economic vastante, you only pay any less in the london eye in donse you pay if you want to go up and take a spin on the wheel side of the Thames, where they pay 31.50 euros.