L
lacustrine plain
land bridge
landlocked
Laos
latitude and longitude
Latvia
Law of the Sea
Lebanon
leeward and windward
Lena River
Lesotho
Lewis and Clark
Liberia
Libya
Liechtenstein
Lisbon
Lithuania
littoral
llanos
loess
Loire River
London
Lop Nor
Los Angeles
Louisiana
Louisiana Purchase
Luxembourg
Luxor
Luzon