We have been to Windsor castle (since it is only about 5 minutes away by car) and we get in for free since we are residents of the Royal Borough of Windsor and Maidenhead.  That saved us UK£16!  Everywhere we go there are daffodils on the side of the road.

The top of Windsor Castle
Top of Windsor Castle - 43k
The Moat
The moat - 105k
Julie
The wife - 80k
Trees and Daffodils
Trees and daffodils - 69k
The "Long Walk" leading up to Windsor Castle.  The bit you can see is the bit where QE II stays when she is in.
When QE II is home, the Royal Standard is flown, otherwise it is the Union Jack.
The Long Walk - 72k