Call of Duty Black Ops 2 Multiplayer Map Magma.

"Tight engagements in this lava overrun Japanese city."

Magma is a multiplayer map included in the Call of Duty: Black Ops II downloadable content pack Uprising. It is set in the futuristic city of Kitakyushu, Japan which has been abandoned due to a disastrous event caused by a volcanic eruption. The map has some spots covered in volcanic rock and lava that will damage or kill players that step foot in said areas.

Trivia
If one is in the middle lane above, one can witness the volcano erupting and blowing debris and molten rock from its crater.
Before a patch, at the very beginning of the river, one could Dive to Prone into a small area of lava, and not be killed. Instead, they'd land and were able to stay there. However, moving in the wrong direction would cause players to die.
In the Uprising trailer, the lava was flowing toward players on the streets, killing them. As a result of the map, this was removed, making the lava stay in place.
The sign that shows Magma before the eruption can clearly show water underneath the mountain. However, If one was to go in theater mode, one can clearly see that the lake is not present, and instead is replaced with a hill.