Houses of Parliament in London - being impressive from outside offers even more exciting interior views and experience. UK residents and overseas visitors can come and watch Parliament at work for free.
Changing the Guard at Buckingham Palace is one of must-see events in London and free of charge.
Sunday Organ Recitals at St.Paul's Cathedral in London take place at 4.45pm. These recitals are free and last about 30 minutes. All are welcome to attend.
Westminster Abbey - is British nation's Coronation Church and also the burial and memorial place for historical figures from the last thousand years of British history. The Abbey doesn't charge people who wish to worship. The life of Westminster Abbey revolves around the daily pattern of worship; Morning Prayer, Evensong, and the Eucharist. These services are open to the public and congregations include people from all over the world.