KnowraPorto VelhoLinked fromLinked fromThe 3 pages that link to Porto Velho, each with the reason it gives.All 3Broader topic 2Compared with 1ManausCompared with: It is another Brazilian Amazon capital, with a different river setting and economic history.RondôniaBroader topic: The city grew around Madeira-Mamoré Railway construction and became the state’s administrative center.Madeira RiverBroader topic: The city is the river’s principal Brazilian urban and transport hub.