Lanfront Ruins

The Lanfront Ruins are a location introduced in Super Adventure Rockman and include the Temple of the Moon, which is the location of the alien supercomputer Ra Moon.

Super Adventure Rockman
Dr; Wily finds the supercomputer Ra Moon, which rebuilds his Robot Masters from Mega Man 2 and Mega Man 3.

Archie Comics
In the Mega Man comic series by Archie Comics, Dr. Wily stumbles across the Lanfront Ruins just as he does in Super Adventure Rockman. They become his base of operations up until the Worlds Collide crossover event, the blue Chaos Emerald having landed in the surrounding rainforest. Afterwards, Ra Moon attacked Wily, and attempted to destroy all technology save for those he either created or repaired to cause mankind to fall into anarchy.

A comment by Dr. Light to Pedro in Issue 13 implied that Light and Pedro had earlier underwent an expedition to the ruins at least three years prior to the events of the comic.