evidence: SERRA DO PARECIS EM GUAJARÁ MIRIM RONDÔNIA,28/12/2014. [...] Guajará-Mirim is a municipality in the Brazilian state of Rondônia. It is located at an altitude of 128 meters. Its population was 41,467 (2005) and its area is 24,856 km². It lies along the Mamoré River, just across the Bolivian border town of Guayaramerín. It was once the southern terminus of the Estrada de Ferro Madeira-Mamoré (the Madeira-Mamoré Railway), which was inaugurated in 1912. It is the seat of the Roman Catholic Diocese of Guajará-Mirim. The Isla Suárez or Ilha de Guajará-mirim (Brazil) is one of the world's many disputed territories. The island lies in the Rio Mamoré, which defines part of the boundary between the two South American nations.