Battle Island is a rocky island with an active volcano and a small forest. A large building was constructed on it to hold the thousands of spectators who came to watch the Intergalactic Martial Arts Tournament.
Battle Zones are specially constructed chambers built beneath Battle Island 2. They serve as arenas for contestants to fight an Intergalactic Fighter (each of them one of Mr. Satan's pupils). They utilize some sort of virtual reality technology, giving them the appearance of a city, lava cavern, or toy box.
Battle Zone 1: A flowery meadow with a large lake, which also houses a large, empty Victorian-styled city that heavily resembles London. Future Trunks encountered Kogu here, and fought and eventually killed him. Later, the Z-Fighters fight the Galaxy Soldiers in the city.
Battle Zone 3: An almost surreal world that resembles a massive toybox. Several giant children's toys, such as building blocks, dolls, teddy bears, rocking horses and even a huge analogue clock. The sky is filled with purple clouds. There are also a huge barrier of balloons to which allow the arrived fighter a "soft" landing. Gohan encounters Bujin here, before the latter used his psychic powers to warp the Battle Zone into a forested area. It is unknown if the forest is the Zone's true appearance, and that the toybox was just an illusion.
Battle Zone 5: The final zone. A large ancient ruined city that resembles ancient Greece. Bojack waited here for the Galaxy Warriors to defeat the combatants, and brought them there. After Gohan arrives, he transforms into a Super Saiyan, and begins to battle Bido, Bujin and Zangya. They smash through the artificial sky/ceiling, and head into the London-like city of the Battle Zone 2.