evidence: Guajará-Mirim (pop. 29.000, 2004) is in the western part of the state of Rondônia in Brazil. It is separated from Bolivia by the Mamoré River. [...] Small boats take you on the five minute trip across the river into the Bolivian border town of Guayaramerín. [...] See [edit]Do [edit]Buy [edit]Eat [edit]Drink [edit]Sleep [edit]Go next [edit]- Guaporé Nature Reserve - The 18th-century fort of Príncipe da Beira is three days by boat from Guajará-Mirim. It can also be reached by road. Take BR-364 to AM-429, which goes to the town of Costa Marques.