Goron city is really two cities in one. The real city is near the center of the volcano, and is home to 500 Gorons. The other is for "outsiders", for only Gorons are aloud in the real city. Access into the real city is on the other side of a pool of lava. And sense Gorons are immune to heat and lava, it isn't much of a problem for them. Gorons build bombs, and sell bomb flower fruit that has been "defused" so that it won't blow up in your face. They also sell rocks, but that market is only getting business from other Gorons(for obvious reasons).
