We had a wonderful weekend in London for my birthday.
On Sunday we went to Greenwich, and although it was rainy, cloudy and cold we had a wonderful day exploring the surroundings.
We also visited the prime meridian and took the picture as requested. Afterwards we tried to spot the prime meridian that the GPS Device shows.
When trying to solve the question we also had a educational experience when following the advice from the hint.

thank you for taking us here and making us a little bit smarter
fine_turtle

GCId: GCK7HH
Owner: MiketheFiddler
Typ:
D/T: 1.5/1
Land: Vereinigtes Königreich
Region: London
Koordinaten : N 51° 28.677 W 000° 0.090
Gelegt: 08.08.2004
Status: ok

Gefunden: 15.03.2015