Marshall Islands: lowest point: Pacific Ocean 0 m
highest point: unnamed location on Likiep 10 m
Martinique: lowest point: Caribbean Sea 0 m
highest point: Montagne Pelee 1,397 m
Mauritania: lowest point: Sebkha de Ndrhamcha -3 m
highest point: Kediet Ijill 910 m
Mauritius: lowest point: Indian Ocean 0 m
highest point: Mont Piton 828 m
Mayotte: lowest point: Indian Ocean 0 m
highest point: Benara 660 m