8. Museums and art galleries are FREE
The best things in life are free indeed. The Natural History Museum, The Science Museum, The British Museum and many more are free for anyone to visit.
You easily spend all your days in London by visiting tons of popular attractions around the city.
Spend a day drifting through the many historical artefacts and enjoy the rich heritage the city has to offer. Of course, donations are most welcome, but in no way mandatory.