Carajás Airport — Parauapebas, Brazil

Carved out of Amazon rainforest in the eastern reaches of Pará state, Carajás Airport (CKS) exists chiefly because of what lies underground: one of the planet's largest iron ore deposits. Vale, the mining giant, relies on this airfield to move personnel and executives between the remote Carajás mineral province and Belém or São Paulo, since the surrounding jungle offers no practical road alternative for fast travel. Parauapebas itself sprang up almost entirely around the mining boom, transforming within a few decades from sparse settlement to a bustling municipality. The single paved runway accommodates jet equipment despite the isolation, and cargo operations tied to logistics for the mining complex supplement the modest passenger schedule. Flights here connect an otherwise hard-to-reach corner of the Amazon basin to Brazil's wider air network.