The last Aussie 18 yr old we entertained was really into Sherlock, so we took her to a couple of those locations (then we got involved in a bit of argy-bargy on Old Crompton Street, which was probably more memorable for her). A couple of years earlier we took some other (much older) friends on the Waterloo - Westminster - Southbank - Tower bridge - St Pauls walk, which was much appreciated. I would have thought a tourist bus ride, a museum and a couple of pubs should do it.
The last Aussie 18 yr old we entertained was really into Sherlock, so we took her to a couple of those locations (then we got involved in a bit of argy-bargy on Old Crompton Street, which was probably more memorable for her). A couple of years earlier we took some other (much older) friends on the Waterloo - Westminster - Southbank - Tower bridge - St Pauls walk, which was much appreciated. I would have thought a tourist bus ride, a museum and a couple of pubs should do it.