Turkmenistan
flat-to-rolling sandy desert with dunes rising to
mountains in the south; low mountains along border with Iran;
borders Caspian Sea in west
Turks and Caicos Islands low, flat limestone; extensive marshes and mangrove swamps
Tuvalu
very low-lying and narrow coral atolls
Uganda
mostly plateau with rim of mountains
Ukraine
most of Ukraine consists of fertile plains (steppes) and
plateaus, mountains being found only in the west (the Carpathians),
and in the Crimean Peninsula in the extreme south
United Arab Emirates
flat, barren coastal plain merging into rolling
sand dunes of vast desert wasteland; mountains in east
United Kingdom
mostly rugged hills and low mountains; level to
rolling plains in east and southeast
United States
vast central plain, mountains in west, hills and low
mountains in east; rugged mountains and broad river valleys in
Alaska; rugged, volcanic topography in Hawaii
Uruguay
mostly rolling plains and low hills; fertile coastal lowland
Uzbekistan
mostly flat-to-rolling sandy desert with dunes; broad,
flat intensely irrigated river valleys along course of Amu Darya,
Syr Darya (Sirdaryo), and Zarafshon; Fergana Valley in east
surrounded by mountainous Tajikistan and Kyrgyzstan; shrinking Aral
Sea in west