Greece: lowest point: Mediterranean Sea 0 m
highest point: Mount Olympus 2,917 m
Greenland: lowest point: Atlantic Ocean 0 m
highest point: Gunnbjorn 3,700 m
Grenada: lowest point: Caribbean Sea 0 m
highest point: Mount Saint Catherine 840 m
Guadeloupe: lowest point: Caribbean Sea 0 m
highest point: Soufriere 1,467 m
Guam: lowest point: Pacific Ocean 0 m
highest point: Mount Lamlam 406 m