hi Stephanie,
Welcome to the forum! London is really a lovely city and there's plenty to see. Here it's a few a things you can see which won't cost you anything:
-Watch the Changing the Guard ceremony outside
Buckingham Palace. This is where 1 member of Queen's Guards exchanges duty with the previous guard.
- Visit the Sir John Soane's Museum and see some remarkable antiquities from all four corners of the globe.
- The Kenwood House is home to the most magnificently decorated libraries in the world, as well as the Iveagh Bequest – a collection of exquisite paintings by Rembrant, Vermeer, Turner, Reynolds and Gainsborough.
-RAF
Museum where you can see more than 80 aircraft on display, together with uniforms, weapons, photographs and more.