The document provides information about several landmarks and attractions in London:
1) The Big Ben clock tower is located next to the Houses of Parliament in London and stands 96.3 meters tall.
2) The London Eye observation wheel costs £32 for adults and is 135 meters above sea level. Children under 4 are free when accompanied by an adult.
3) Madame Tussauds wax museum is located in London and several other major cities. It features wax figures of popular characters, musicians, actors, and other celebrities.