London, Piccadilly Circus. I lost a gold bracelet near here when I was with my boyfriend at the time (we were in touch until he passed away in a motorcycle crash a few years back) that had an inscription from my 1986 summer in Spain with Spanish friends.
Big Ben and the underground | Flickr - Photo Sharing!
Piccadilly Circus Tube Stop, The Underground, London (End of London Walk #4)
London Underground. Some of the stations have some very long escalators.