PeruRail is a railway operator providing tourist, freight, and charter services in southern Peru. It was founded in 1999 by two Peruvian entrepreneurs and the British company Sea Containers. The main line between the port of Matarani, Arequipa, Cusco and Puno on Lake Titicaca was formerly known as the Ferrocarril del Sur (Peru Southern Railway), and was for a time owned and operated by the ENAFER state company. It is the third highest railway in the world after the Qinghai–Tibet Railway to Tibet and the FCCA line from Lima to Huancayo, and is the longest line in Peru. From Cusco, PeruRail provides passenger services on the gauge Ferrocarril Santa Ana to Aguas Calientes, delivering tourists for Machu Picchu. It operates in a 50/50 joint venture between Belmond Limited and Peruvian Trains and Railways, owned by two Peruvian entrepreneurs; Lorenzo Sousa Debarbieri is the chairman of the board of directors of the company. Routes PeruRail's routes are divided into two sections. The line between Cusco and Machu Picchu - Ferrocarril Santa Ana - is a narrow gauge line, which boasts a series of five switchbacks called locally 'El Zig-Zag', which enable the train to climb up the steep incline out of Cusco, before it can begin its descent to the Sacred Valley of the Incas and then continue down to Machu Picchu. However, this section of the route (between Cusco San Pedro station and Poroy) - which had been suspended - resumed by Inca Rail from May 2019. Other trains to Machu Picchu leave from Poroy, just outside Cusco, instead. From Poroy, the narrow-gauge line goes northwest to Ollantaytambo, where the branch from Urubamba joins, then on to Machu Picchu station in Aguas Calientes. Tracks formerly continued into the jungle, but they were destroyed by recent flooding. The network, formerly Ferrocarril del Sur, starts at Matarani port, goes through Arequipa and enters Puno Region, where the line splits in two at Juliaca. The eastern branch goes to Puno; the western branch runs into Cusco. At its highest point, La Raya Pass (), the altitude is . The train makes a stop in La Raya Pass where there is a clear view of the surrounding landscape. There's no more passenger traffic between Arequipa and Matarani, and it was also suspended on the Juliaca - Arequipa line for several years until May 2017 when the Belmond Andean Explorer was inaugurated. There is a