Peru is bordered by five countries. In alphabetical order, name the first two.

Peru shares its borders with five other South American nations. When listed alphabetically, the first two are indeed Bolivia and Brazil, followed by Chile, Colombia, and Ecuador. These frontiers traverse some of the continent's most dramatic and diverse landscapes, from the high-altitude plains of the Andes to the dense, river-filled lowlands of the Amazon basin, reflecting the immense geographical variety of the region.

The border with Bolivia to the southeast stretches for over 900 kilometers. A significant portion of this boundary cuts across the Altiplano, or high plateau, of the Andes mountains. Its most famous feature is Lake Titicaca, the world's highest navigable lake, which is split between the two countries. This region is rich in indigenous history and culture, with communities on both sides of the border sharing a common heritage that predates the modern nations themselves. The main border crossings are at Desaguadero and near the town of Copacabana, connecting regions with deep historical ties.

To the east lies Peru's longest international border, shared with Brazil. This extensive frontier runs for thousands of kilometers almost entirely through the remote and sparsely populated Amazon rainforest. Unlike the mountainous Bolivian border, this boundary is largely defined by rivers snaking through the jungle. For most of its length, it is inaccessible by road. The primary land crossing is the Brazil-Peru Integration Bridge over the Acre River, a key part of the Interoceanic Highway which provides a crucial, though isolated, link between the two nations through the formidable Amazon.