This isn't something you can actually *see*, but years ago, my rather
well-off great-uncle and his wife lived in a large flat on the top floor
of a very grand block in Hyde Park Street. Which was lovely - but for
the fact that whenever a Central Line train went underneath, which it
frequently did, the entire flat vibrated!
--
Annabel Smyth
http://www.amsmyth.demon.co.uk/index.html
Website updated 8 March 2004