The rock that guards the Mediterranean is the rock of Gibraltar. It has been a symbol of British Naval strength since the 18th century.
It strategically guards the western entrance to the Mediterranean Sea.
It is the British Naval Base at Gibraltar. The Rock of Gibraltar being the famous physical feature.
Of the European countries, the Western entrance of the Mediterranean is guarded primarily by Spain, but also by the United Kingdom on account of Gibraltar. Morocco also guards the Western entrance to the Mediterranean, but it is not a European country.
The Iberian Peninsula.
The Rock of Gibraltar
Mediterranean sea
The Rock of Gibraltar
The Rock of Gibraltar
The Rock of Gibraltar
The Rock of Gibraltar
Gibraltar
The Mediterranean Sea