Another place that you visit as a tourist, but don't as a Londoner. St Paul's Cathedral has such a place in history, being rebuilt after the Great Fire of London with the architect Sir Christopher Wren.
With your ticket, you can go up into the dome, with incredible views over London. Beware, I had not discovered my fear of heights until I made my way up the 3rd set up stairs in the dome. This is not for the faint hearted, not only for the 528 steps up but also for the final section of metal steps inside the dome that can make you a bit unsteady on your feet!
If you don't feel you can make the highest 'Golden Gallery', do take the 257 steps up to the whispering gallery, not only is it magical but you get a great view of inside the Cathedral.
Location: St Paul's