The Open House event in the capital sees over 700 private buildings across the capital open their doors to the public.
The following places are free to get into and there's no need to book. Showings work on a first come first serve basis. There will only be queuing if it is necessary.
1. 30 St Mary Axe (The Gherkin)
2. HM Treasury
3. London King's Cross and St Pancras International stations
4. Bank of England
5. Brixton Windmill
6. Foreign and Commonwealth Office
7. City Hall
8. Horse Guards
9. Lloyd's of London
10. Battersea Power Station
Read more about Open House London at its official site