The Presidential Palace in Lima is located on the Zocalo for Lima. The Zocalo is quite large, with the palace occupying one side. As my travels in Lima were quite limited, I could not tell you how to find this palace, but most people in Lima would be happy to point out the directions to you.
Most of Lima's important historical and architectural landmarks are concentrated in the city's colonial core, just south of the Rímac River. This area of streets measures about 1.5 km (.9 mi) on each side and is centered around the Plaza de Armas, site of the city's most significant religious and political institutions. Lima was founded on this site in 1535 by Spanish soldier Francisco Pizarro, and the fountain in the central square dates from 1651. An earthquake in 1746 destroyed all of the colonial structures on the plaza, which were rebuilt in subsequent decades.
Cambio de Guardia a mediodía. Chequear con la guardia e inscribirse el día anterior en el edificio al lado de la estatua de Pizarro con pasaporte en mano.
Los uniformes de esta guardia son réplicas de las que llevaba el regimiento que resultó victorioso en la batalla de Junín (1824). El cambio de guardia vale la pena de ver.
This impressive government building from the early 1900's draws its fair share of attention with noon ceremonial changing of the guards.