The Union Buildings form the official seat of the South African Government and also house the offices of the President of South Africa. The imposing buildings are located in Pretoria, atop Meintjeskop at the northern end of Arcadia, close to historic Church Square. The large gardens of the Buildings are nestled between Government Avenue, Vermeulen Street East, Church Street, the R104 and Blackwood Street. Fairview Avenue is a closed road through which only officials can enter the Union Buildings. Though not in the centre of Pretoria, the Union Buildings occupy the highest point of Pretoria, and constitute a South African national heritage site.