Made by Capsule Corp. The highest gravity that can be achieved in the gravity capsule is 450 times Earths normal gravity. This capsule is an excellent training place.
Who Trained in the Gravity Capsule:
Goku, Vegeta (trained the hardest in it before the Androids come and then after the Cell Games), Chibi Trunks, Yamcha(yes, Yamcha tried to train in the gravity capsule at the same gravity than Vegita and almost gets killed, it was too much for him)
Kami's palace is located high above the clouds. That is where the Z fighters come and train sometimes. The Hyperbolic Time Chamber is also located on Kami's Palace.
Who Trained and Kami's palace:
Yamcha, Tien, Krillin, Chaozu, Yajirobe, Chibi Goku
Master Roshi's Island
This is a small island located about 20 minutes from Ginger Town. This is where Master Roshi lives. Master Roshi lives with a turtle named Turtle who has a power level of 0.001, pretty pathetic.
Who trained at Kamisennins Island
Krillin, Chibi Goku, Adult Goku
King Kai's planet
King Kai's planet is located at the end of snake way and in the Northern Galaxy. King Kai's planet has more gravity than earth. King Kai lives here with Bubbles the monkey and Gregory the Cricket. Most people train here when they die.
Who trained at King Kai's planet:
Goku, Tien, Yamcha, Chaozu, Piccolo
Gohan trained at this planet to get ready to fight Super Buu. Goku also trained here DBGT to grow his tail back out.
Who trained at Kaioshin's planet:
Hyperbolic Time Chamber
This is located at Kami's Palace.It is a strange room its in the middle of nowhere surrounded by whiteness. You must overcome very big obstacles in order to survive. The temperatures change rapidly. In this Mysterious room you can get a year of training in 1 day. You can only enter a total of 2 times.
Who trained in the room of spirit and time
Chibi Goku, Adult Goku, Gohan, Vegeta, Goten, Chibi Trunks, Future Trunks, Piccolo