Tuvalu
lowest point: Pacific Ocean 0 m
highest point: unnamed location 5 m
Uganda
lowest point: Lake Albert 621 m
highest point: Margherita Peak on Mount Stanley 5,110 m
Ukraine
lowest point: Black Sea 0 m
highest point: Hora Hoverla 2,061 m
United Arab Emirates
lowest point: Persian Gulf 0 m
highest point: Jabal Yibir 1,527 m
United Kingdom
lowest point: The Fens -4 m
highest point: Ben Nevis 1,343 m
United States
lowest point: Death Valley -86 m
highest point: Mount McKinley 6,198 m
United States Pacific Island Wildlife Refuges
lowest point: Pacific
Ocean 0 m
highest point: Baker Island, unnamed location - 8 m; Howland Island,
unnamed location - 3 m; Jarvis Island, unnamed location - 7 m;
Johnston Atoll, Sand Island - 10 m; Kingman Reef, unnamed location -
less than 2 m; Midway Islands, unnamed location - 13 m; Palmyra
Atoll, unnamed location - 3 m
Uruguay
lowest point: Atlantic Ocean 0 m
highest point: Cerro Catedral 514 m
Uzbekistan
lowest point: Sariqarnish Kuli -12 m
highest point: Adelunga Toghi 4,301 m
Vanuatu
lowest point: Pacific Ocean 0 m
highest point: Tabwemasana 1,877 m