I believe you're thinking of the Greenwich Observatory in London, England.
The place name associated with the 0 degree meridian is Greenwich, London, United Kingdom. This is where the Prime Meridian is located and is considered the starting point for measuring longitude. The Royal Observatory in Greenwich marks the spot where the Prime Meridian passes through.
greenwich
Greenwhich
It is 0 degrees.
0 degree longitude is is called the Prime Meridian.
dude, your funny 0*
Prime meridian
the prime meridian(:
The Prime Meridian is at zero degrees longitude and every possible latitude.
The Prime Meridian
It was chosen as the base 0 degree meridian for longitude.
The prime meridian is a line at 0 degrees longitude.