Rio Branco-Placido de Castro International Airport sits eighteen kilometers out of town on the BR-364. A city bus runs hourly from six in the morning to eleven at night - the stop is a short walk from the terminal, though at night drivers will often pick passengers up directly from the building. The taxi mafia charges a flat hundred reais to anywhere in the city; Uber exists but is unreliable. It is entirely normal for travelers arriving on a late flight to sleep in the open-air terminal until morning bus service resumes. The urban bus network inside town costs four reais a ride as of 2018, with free transfers. Shared taxis - called lotacoes locally - are the popular way to cover medium distances, leaving as soon as four passengers show up.

Rio Branco's real role is as a crossroads. Buses run daily to Porto Velho (nine hours, for the onward boat to Manaus), to Brasileia on the Bolivian border (four and a half hours), to Xapuri (three and a half hours - the home town of the environmental activist Chico Mendes), and to Assis Brasil on the Peruvian border (eight hours). The weekly Sao Paulo-to-Lima express stops here on Saturday mornings around 3 AM, offering through tickets to Cuzco or Lima if you are willing to commit to another long day on a bus. Lotacoes and private car services fill the gaps. This is a city where getting somewhere else is half the point.

Rio Branco is tropical, and for most of the year the weather is exactly what you would expect nine degrees south of the equator: hot, humid, with strong rains between October and April. But the city sits just close enough to the south that an unusual phenomenon called friagem - a cold air mass of polar origin pushing up from Patagonia - can occasionally chill it to single digits in the dry season. These cold snaps rarely last more than a week. At the other extreme, the end of the dry season, between August and September, can deliver scorching days above 37 degrees Celsius, and the surrounding forest sometimes burns. Drink water. Travelers used to the Amazon farther east sometimes underestimate how the Acre region's climate can swing.

The Gameleira district, where the city was born, wraps around a river bend on the old right bank. The strangler fig tree that gave the neighborhood its name is still there, impressively large, surrounded by a boardwalk. Walk south along the Rio Acre and you will pass the pedestrian catwalk - Joaquim Macedo - and reach the Parque da Maternidade, a long stretch of greenery the locals use in late afternoons when the sun finally loses its edge. Inside the park you will find the Casa dos Povos da Floresta, a museum about the forest peoples of Acre, and the Casa do Artesao. On Tuesday and Thursday evenings, free local dance performances happen near the lake. The Fundacao Garibaldi Brasil hosts rotating cultural events worth checking on arrival.

Acre is one of Brazil's biggest producers of acai, and the way people eat it here has nothing to do with the frozen superfood bowl at a Los Angeles gym. Locally, the fresh unsweetened purple juice is mixed with a spoon of manioc flour for crunch and then sweetened with sugar or condensed milk. It is dinner, not dessert. Another specialty is tacaca - a broth made from manioc water and jambu leaves, which produce a mildly numbing tingle in the mouth. The goma, a gooey paste, dissolves into the broth; you drink it directly from the bowl. Street markets sell sweets and juices made from tucuma palm nuts and the sour cream-colored fruit cupuacu. In the hot months, holes-in-the-wall all over town press fresh orange juice for three or four reais a cup.

The obvious onward destinations say a lot about where Rio Branco sits. Xapuri, three hours away, is where Chico Mendes lived and was murdered in 1988, the rubber-tappers union leader whose death turned Amazonian conservation into a global story. Cobija, across the Bolivian border, is where Brazilians go for cheap shopping. Porto Velho, to the northeast, offers riverboat passage to Manaus - a two-thousand-kilometer trip down the Madeira and Amazon. Puerto Maldonado, over the Peruvian border, opens onto the jungle roads of the southern Peruvian Amazon. Rio Branco is not the destination for most travelers so much as the hinge - the place where one kind of Amazon trip ends and another begins.