St. Paul's Cathedral
Designed by Sir Christopher Wren, St Pauls Cathedral is one of London's most famous and recognisable sights. The dome is among the highest in the world. St Paul's Cathedral is a working church with hourly prayer and daily services. The cathedral is open for sightseeing from Monday to Saturday. On Sunday the cathedral is open for worship only.
Admission is £18 for adults and £7 for children, and allows entry to the cathedral floor, the crypt and the three galleries in the dome.