You might think of Brazil's vast Amazon basin as largely rainforest and wilderness. That's mostly (still) true, but its capital is a big city, population around 2 million, located where the River Negro meets the mighty Amazon River. Manaus has been around since the 17th century, but it wasn't until the 19th that it turned into a boomtown whose legacy still amazes visitors. The reason starts with names like Goodyear and Dunlop... keep reading