Death Mountain Crater

This is the volcanic center of Death Mountain. It can be accessed from the top of Death Mountain or through an ancient Goron pathway that leads from the chief's room. The heat of the crater is too intense to be in for very long unless one wears a Goron Tunic.

It is the location of the Fire Temple and home to Volvagia. It also contains a Great Fairy fountain. The Crater can also be accessed by playing the Bolero of Fire, which teleports Link to the Triforce stand there. The Bolero of Fire is taught to Link by Shiek when he first enters the crater as an adult.

Twilight Princess
Although there is not an actual explorable crater area in the game, it may be possible to see the crater from a point in Twilight Princess. At the top of Death Mountain, just outside the Goron Mines enterance, a crater-like part of the mountain is visible, in which you can see (what looks like) the metallic door enterance to the Ocarina of Time Fire Temple.