Marte Vallis (Mars)

Spanish word for "Mars".

Marte Vallis is 185 km long and was named for the Spanish word for "Mars". It has been identified as an outflow channel, carved in the geological past by catastrophic release of water from aquifers beneath the Martian surface. Marte Vallis is the site of the first discovery of columnar jointing on Mars. (wikipedia entry)

A vallis is a valley. On Mars large valles are named after words for Mars/star in various languages. Small valles are named after classical or modern names of rivers.