Heaven

There are several places in Heaven where you can go:

Kaio-sama's Planet
(x10 Gravity)
Here is where you train with Kaio-sama.
You can be here only if you train with the Kaio-sama.

Grand Kaio's Palace
The Nexus of the Universe. Here, all training done is multiplied by 1.5, in addition to whatever other training-enhancing clothing you may have.

Kaioshin's Temple
This is where the Kaioshin lives. It is the only place where you can learn Mystic Fighting, or recieve the Zento Saber.

Hfil
(Home For Infinate Losers)
This is where defeated enemies live after they die. You can fight them here to gain additional power, if you chose to.

Each one of these places is 1 week apart from each other, and you must go on a quest to reach Kaio-sama's Planet.