South Africa is located at the southernmost region of Africa, with a long coastline that stretches more than 2,500 km (1,553 mi) and along two oceans (the South Atlantic and the Indian).

According to the UN Demographic Yearbook, South Africa is the 25th-largest country in the world. It is about the same size as Colombia, twice the size of France, three times as big as Japan, four times the size of Italy and five times the size of the United Kingdom.

Mafadi in the Drakensberg at 3,450 m (11,320 ft) is the highest peak in South Africa. Excluding the Prince Edward Islands, the country lies between latitudes 22° and 35°S, and longitudes 16° and 33°E.

The interior of South Africa consists of a vast, in most places almost flat, plateau with an altitude of between 1,000 m (3,300 ft) and 2,100 m (6,900 ft), highest in the east and sloping gently downwards towards the west and north, and slightly less noticeably so to the south and south-west. This plateau is surrounded by the Great Escarpment whose eastern, and highest, stretch is known as the Drakensberg.

The south and south-western parts of the plateau (at approximately 1100–1800 m above sea level), and the adjoining plain below (at approximately 700–800 m above sea level) is known as the Great Karoo, which consists of sparsely populated scrubland. To the north, the Great Karoo fades into the even drier and more arid Bushmanland, which eventually becomes the Kalahari Desert in the very north-west of the country. The mid-eastern and highest part of the plateau is known as the Highveld. This relatively well-watered area is home to a great proportion of the country’s commercial farmlands, and contains its largest conurbation (Gauteng Province). To the north of Highveld, from about the 25° 30′ S line of latitude, the plateau slopes downwards into the Bushveld which ultimately gives way to the Limpopo lowlands or Lowveld.

Flat topped hills (called Karoo Koppies) are highly characteristic of the southern and southwestern Karoo landscape. These hills are capped by hard, erosion resistant dolerite sills. This is solidified lava that was forced under high pressure between the horizontal strata of the sedimentary rocks that make up most of the Karoo’s geology about 180 million years ago. Since then Southern Africa has undergone a prolonged period of erosion removing the relatively soft Karoo rocks, except where they are protected by a cap of dolerite. This photograph was taken near Cradock in the Eastern Cape.

The coastal belt, below the Great Escarpment, moving clockwise from the northeast, consists of the Limpopo Lowveld, which merges into the Mpumalanga Lowveld, below the Mpumalanga Drakensberg (the eastern portion of the Great Escarpment). This is hotter, drier and less intensely cultivated than the Highveld above the escarpment. The Kruger National Park, located in the provinces of Limpopo and Mpumalanga in northeastern South Africa, occupies a large portion of the Lowveld covering 19,633 square kilometres (7,580 sq mi.)  South of the Lowveld the annual rainfall increases as one enters KwaZulu-Natal Province, which, especially near the coast, is subtropically hot and humid. The KwaZulu-Natal – Lesotho international border is formed by the highest portion of the Great Escarpment, or Drakensberg, which reaches an altitude of over 3,000 m (9,800 ft). The climate at the foot of this part of the Drakensberg is temperate.

Drakensberg, the eastern and highest portion of the Great Escarpment which surrounds the east, south and western borders of the central plateau of Southern Africa

The coastal belt below the south and south-western stretches of the Great Escarpment contains several ranges of Cape Fold Mountains which run parallel to the coast, separating the Great Escarpment from the ocean.  The land (at approximately 400–500 m above sea level) between two of these ranges of fold mountains in the south (i.e. between the Outeniqua and Langeberg ranges to the south and the Swartberg range to the north) is known as the Little Karoo, which consists of semi-desert scrubland similar to that of the Great Karoo, except that its northern strip along the foothills of the Swartberg Mountains, has a somewhat higher rainfall and is therefore more cultivated than the Great Karoo.

The Little Karoo is historically, and still, famous for its ostrich farming around the town of Oudtshoorn. The lowland area (700–800 m above sea level) to the north of the Swartberg mountain range up to the Great Escarpment is the lowland part of the Great Karoo (see map at top right), which is climatically and botanically almost indistinguishable from the Karoo above the Great Escarpment. The narrow coastal strip between the most seaward Cape Fold Mountain range (i.e., the Langeberg–Outeniqua Mountains) and the ocean has a moderately high year-round rainfall, especially in the George-Knysna-Plettenberg Bay region, which is known as the Garden Route. It is famous for the most extensive areas of indigenous forests in South Africa (a generally forest-poor country).

In the south-west corner of the country the Cape Peninsula forms the southernmost tip of the coastal strip which borders the Atlantic Ocean, and ultimately terminates at the country’s border with Namibia at the Orange River. The Cape Peninsula has a Mediterranean climate, making it and its immediate surrounds the only portion of Africa south of the Sahara which receives most of its rainfall in winter.[82][83] The greater Cape Town metropolitan area is situated on the Cape Peninsula and is home to 3.7 million people according to the 2011 population census. It is the country’s legislative capital.

The coastal belt to the north of the Cape Peninsula is bounded on the west by the Atlantic Ocean and the first row of north-south running Cape Fold Mountains to the east. The Cape Fold Mountains peter out at about the 32° S line of latitude, after which the coastal plain is bounded by the Great Escarpment itself. The most southerly portion of this coastal belt is known as the Swartland and Malmesbury Plain, which is an important wheat growing region, relying on winter rains. The region further north is known as Namaqualand, which becomes more and more arid as one approach the Orange River. The little rain that falls tends to fall in winter, which results in one of the world’s most spectacular displays of flowers carpeting huge stretches of veld in spring (August–September).

Cape Floral Region Protected Areas.

South Africa also has one possession, the small sub-Antarctic archipelago of the Prince Edward Islands, consisting of Marion Island (290 km2 or 110 sq mi) and Prince Edward Island (45 km2 or 17 sq mi).