3) Union Buildings (Pretoria, South Africa)
The Union Buildings form the official seat of the South African government and also house the offices of the president of South Africa. With its vast gardens, the buildings are located in Pretoria and constitute a South African national heritage site. These remarkable buildings, built from light sandstone, were designed by the architect Sir Herbert Baker in the English monumental style and are 285m long. The architectural design of the buildings is simply wonderful and a must see.