Zebes
Areas
Crateria
This is a cave like place with bats and strange creatures. Lots of raining and dark caverns. It's a very violent area.
Brinstar
A green forest filled with trees, danger and bosses. Actually, there are two Brinstar areas; the Lush underground forest, and the dark caverns. With fierce hoppers, sprout plants, this is a dangerous place.
Maridia
Mostly underwater area. Requires the Gravity Suit to this place, otherwise, your dead.
Wrecked ship
This actually not a area but a crashed spaceship of a different civilization. There are very strange life forms and ghosts here, and a hard boss, Phantoon. Watch your back.
Norfair
Another cavern on Zebes is the red hot Norfair. A fiery place, it mostly requires the Varia suit to stand high temperatures. Lava lakes, fiery creatures, this is hell.
Tourian
The final place in Zebes, this is, where you'll be fighting most of your main bosses. Many Metroids dwell here including Space pirates.