In message , Peter
Beale writes
The tube "proper" (London Underground) does not serve Greenwich (the
Jubilee Line goes to North Greenwich, which is some way off). The nearest
stations to Flamsteed House in Greenwich Park where the 0° line is marked
out are Maze Hill (on the South East Trains line from Charing Cross to
Dartford via Greenwich) and Cutty Sark (on the Docklands Light Railway
line from Bank to Lewisham). They are both covered by a one-day Travelcard
which includes Zones 1 & 2.

The Meridian runs right through Higher Green (NR) station and is (or at
any rate used to be) marked in the subway there.

When the Millennium Exhibition ("The Dome") at North Greenwich was open
there was supposed to be a place in the grounds where the Meridian was
marked. In *many* visits, I never managed to find it!

Is there anywhere else on the London transport (with a small "t") system
where the Prime Meridian is marked? There was apparently a desire to
name one of the DLR stations after it but it wasn't deemed to be close
enough. (I remember reading this in an edition of "Median tramway" in
about 1987 when the DLR opened but can't recall the details now.

And to reiterate what others have said yes the Royal Observatory is well
worth a visit.
--
Ian Jelf, MITG, Birmingham, UK
Registered "Blue Badge" Tourist Guide for
London & the Heart of England
http://www.bluebadge.demon.co.uk