For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.
The Black Wreckage is a landmark in Xenoblade Chronicles. It is located at the lower level of Fallen Arm. It is near Digit 5 Beach. It marks the final resting place of Metal Face and its pilot, Mumkhar, after their final confrontation with the party at Sword Valley. There is a Heart-to-Heart - "Eternal Scars" - between Melia and Dunban nearby.
The reason for the name of the landmark is that in the Japanese version of Xenoblade Chronicles, Metal Face was known as "Black Face", a name which was changed in translation to remove its racist connotations in English.