The Paraná Valles are a set of channels in a valley in the Margaritifer Sinus quadrangle (MC-19) region of Mars, located at approximately 23.1° South and 10.2° West. They are 350 km long and were named after an ancient and modern name for a South American river (Brazil, Argentina). A low area between the Paraná Valles and Loire Valles is believed to have once held a lake.

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  Example of inverted terrain in the Paraná Valles region, as seen by HiRISE under the HiWish program.
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  The Paraná Valles, as seen by HiRISE (scale bar is 1.0 km)