The eco mine is a location featured in Jak 3. It is a large quarry full of scaffolding and mining equipment which Jak theorized was used by Mar to harvest eco energy for Haven City. During Jak 3, Jak visited the eco mine via the sub-rails from the Monk Temple. While exploring the eco mine, Jak encountered several rare metal heads and other returning creatures from Jak II, and eventually found a pair of greaves, a component of the Armor of Mar set. He then escorted a bomb train which he used to open a path to Haven City. In his way, however, was Veger and his Precursor robot, the latter of which he defeated and re-entered Haven City.
The area is a massive canyon incorporating various mining equipment and scaffolding that has since been long abandoned and overrun with wildlife, such as fodders, mantas, gekkos, and mine rats (all of which, excluding fodders, are exclusive to the eco mine). Although the canyon itself is purely rock, it has been encrusted with heavy steel equipment, infrastructure, and even some Precursor-like structures such as embedded Precursor robots and columns. The entire area contains rails which guide bomb trains which were presumably used to transport mining explosives. Deeper into the eco mine were drilling operations that were oddly operated by the rats which would run on giant hamster wheels to activate the machinery.
The bomb train is a device in Jak 3. It is an explosive-laden carriage encountered in the eco mine. Its original purpose remains unknown, although Jak found four of these in the mission "Explore eco mine". Three of them were in the area where the Precursor robot was fought, and the fourth was activated by Jak to blast open the door that leads to the area itself.
When Jak threw a nearby lever, a large, mechanical arm carried it to an elevator platform where it moved to the main area together with Jak. The bomb train then moved forward on the rails on its own. This forces Jak to escort the bomb train by hitting targets on the track causing pieces of the railway to fall in place properly. At the end it drives into a locked door allowing Jak to continue.
The last three trains were encountered at the same time as Veger's Precursor robot, each stuck on a broken railway above the robot. The robot used an attack that caused multiple pillars to rise from the area, allowing Jak to reach the necessary height to shoot down the trains. Shooting them causes the carts to get loose and fall down onto the boss, causing it to be damaged.