Sao Tome and Principe
volcanic, mountainous
Saudi Arabia
mostly uninhabited, sandy desert
Senegal
generally low, rolling, plains rising to foothills in
southeast
Serbia and Montenegro
extremely varied; to the north, rich fertile
plains; to the east, limestone ranges and basins; to the southeast,
ancient mountains and hills; to the southwest, extremely high
shoreline with no islands off the coast
Seychelles
Mahe Group is granitic, narrow coastal strip, rocky,
hilly; others are coral, flat, elevated reefs
Sierra Leone
coastal belt of mangrove swamps, wooded hill country,
upland plateau, mountains in east
Singapore
lowland; gently undulating central plateau contains water
catchment area and nature preserve
Slovakia
rugged mountains in the central and northern part and
lowlands in the south
Slovenia
a short coastal strip on the Adriatic, an alpine mountain
region adjacent to Italy and Austria, mixed mountains and valleys
with numerous rivers to the east
Solomon Islands
mostly rugged mountains with some low coral atolls