Path to the sky island: This is the way to angel island. This place is rigged with traps and other dangerous objects. Knuckles after all has to protect the master emerald.
Death Egg: This place is not accessable at this time.
City of water: The city of soleana A.K.A the city of water. This is a peaceful place without much troubles. As the name suggests,it has water everywhere and very little land. Not a good place for people who cant swim.
Ice cap castle: This place is a sacred shrine dedicated to the god anubis. Not much other info is known however there are strange things happening to the place.
Casino night: A small amount of land in the form of a casino. Here you have the ussual springs,spikes and other crazy traps. But lately this place has been covered with eggmans minions so beware.
Ice cap: This land is made of nothing but pure ice. Be careful or you could end up hitting a weak spot and fall into the water. This area is surrounded by hills and mountains that are made of ice.
City of darkness: The homeplace to eggmans operations. This is where his main base is located at and is filled to the brim with swat bots and other things,such as flyer bots and the buzz bombers. Enter this place,and its almost certain that you will be robotatized.
Haunted forest: As the name suggests,this place is infested with creepy things. Legend has it,that this place is infested with ghosts and the legendary king boom bomb. No one has every escaped this forest and lived to tell about it.
Mobius hill: The home of sonic and tails, this place holds many diffrent towns, such as station square.
Chemical refinery: Just like on sonic the hedgehog 2,this place holds a chemical plant that is polluting the surrounding areas. This is also one of the main parts to eggmans machine building. It has a strong barrier around it so no one can break through.
Metrotroplis: This place is the heart of all the areas. It was first introduced in sonic the hedgehog 2 and is filled with traps and other things that can crush,grind,and pulverize you. Beware because bot will give chase.
Desert's bones: A dry and baren wasteland. This place was once green and filled with life until eggman began to plow down the trees and other stuff to build his latest factory. The polloution and other things caused this place to dry up. This is also home to the sand snakes.
Energen Cyrstal: A sacred place. Not much else known about it.
Ancient ruins: This is a huge forest and is home to a pyramid in the middle of the forest. This is where sonic first learned about chaos and what would happen if he got all seven emeralds. This also used to be the home of echindas until chaos wiped most of them out. It also holds the fallen ship of eggman.
Wave Ocean: A beach just out the city of water. Its been mostly peaceful,that is until eggman attacked and sent his bots all over the place. Now it is mostly a death trap.
Dusty dessert: This is a unstabe place,with the ruins falling apart,or the ground sinking into the earth. This is not a place for people who cant act quickly.
White Acropolis: One of eggmans bases set up in the kingdom of soleanna. This place is in a snowy region and is filled with high tech military stuff. If you enter this place,you are almost certain to be caught. Most of the dangers come from the amount of bots that are there,watch out for the search lights. If they catch you,they will sound the alarm.
Crisis City: A city from silver and blazes future. It was a peaceful city until iblis attacked and destroyed everything. ((This place is not accesible at this time))
Flame core: A molten series of volcanos and other things causing lava to spew up everywhere. ((This place is not accesible at this time.))
Radical train: The center of all transportation. This place holds hundreds of trains,and is always busy.
Jungle: A jungle outside of the city of water. Its dangerous terrain makes even the most skilled people to worry. It has everything from loop de loops,to diving strait down into water. Eggmans bots have invaded this place as well.
Kingdom Valley: As the name suggests,its a valley outside of soleanna. It is said that the king and queen lived here once and is also the holder of many treasures. Eggman has sent some of his best bots to this location.
Eggmans base: The center of all his operations. Eggmans base is hid deep with kingdom valley and is underwater. This place is filled with his best robots,so intruders beware.
Soleanna forest: The outskirts of soleanna and the only way into kingdom valley. Here you must perform 3 tests to see if your worthy to enter kingdom valley.
New city: A main big part of soleanna. This place is the holder of all their best products. This city is filled with tall buildings and people.
Spagnoia: A large city full of life and busy people. This is where professor pickle is located.
Mazuri: A large and open jungle,combined with a wasteland and a dessert. A bunch of natives live here as well as a temple of gaia.
Empire city: A extreamly big city,full of people and all sorts of things. If you need work then go no further then here.
Adabat: A small town built on a island in the ocean. This place has more water than soleanna so be careful if you cant swim. A temple of gaia is also located here deep on another island in a jungle.
Shamar: A town in the middle of a dessert. This is where professor pickle also travels to for his other research facility. A temple of gaia is located deep in the dessert,past a sandstorm.
Apotos: This is where sonic's adventures began and the first temple of gaia is located. Another place full of life and ...you guessed it...water.
Holoska: A extreamly little town in the middle of nowhere. This place is so cold,you cold freeze to death in under a minute without proper equipment. A temple of gaia is located here.
Chun-nan: A jappanese looking place,it is very intresting to look at and has some great sights. Watch out though,as usual eggmans robots are on the prowl around the great wall. A temple of gaia is located somewhere around here.
Marble Zone: The first lava area of any sonic game. It is located near the dessert bones.
Sky Sanctuary: A large temple up in the sky above angel island. This place is where during the events of sonic and knuckles, the master emerald was located.
Emerald Hill Zone: Located at mobius hill's, this zone used to be green hill zone until sonic stopped dr.robotnik a long time ago during the events of sonic 1.
Chemical Plant Zone: Located in the chemical refinery, this is a water and chemical based zone that sonic and tails traversed in sonic 2.
Mystic Cave Zone: A cave located near the city of darkness. During the events of sonic 2, sonic and tails found out that this area was more annoying in perticular then most. It is full of traps, bugs, dark creatures, and even bottomless pits.
Oil Plant Zone: Located near the chemical refinery and chemical plant zone. This area is a plant that produces oil from the planet. It is also one of the more unstable zones.
Hill top zone: Located near marble hill zone, this area is also filled with lava and shifting floors. Be careful, lava doesnt like to be touched.
Angel Island: Home of knuckles and the master emerald, it's location is in the far north, high above the sea's. Sonic, tails, and knuckles had many disputes on this island. It also holds most of sonic 3's zones as well.
Hydrocity Zone: Located at angel island, this is a water filled zone where your going to find out that most of your time will be spent in the water. Grab a bubble, stay away from choppers, avoid falling debre and you might survive.
Ice cap zone: Located at ice cap and near ice cap castle. This area is a snowy dreamland, until a avalanche happens, then it's a deathtrap. Sonic and tails made their way through this zone in sonic 3.
Mushroom Hill Zone: Located on angel island, this is a mushroom forest from sonic 3 and knuckles. This area isnt too hard to traverse, but it has alot of dangers within, such as vines that trap you while mechanical bugs tear you apart.
Carnival Night Zone: Known to most sonic game players as "The hell stage" This area is located near the casino night zone. It has the spawns of satan, the evil barrels that you have to move up and down to make them move up and down. Go here at your own risk.
Flying Battery Zone: Located near the city of darkness, this fleet of ships was built by eggman long ago to stop sonic and tails.
Emerald Coast: Located at the edge of mobius hills and near station square. This was the first zone of sonic adventure. Killer whales can be seen in the distance.
Windy Valley: Located near the ancient ruins, this area sends you high into the sky onto a bunch of islands. Warning: Tornado's will spawn here.
Station Square: The area known most from sonic adventure and sonic adventure 2. This city is filled with people and of course, G.U.N. It is located at mobius hills.
Pumpkin Hill: A haunted zone filled with pumpkins and ghosts. It is located near the haunted forest.
Space Colony Ark: The massive floating lab that orbits the planet. The space colony ark was where shadow the hedgehog was created, and many things were studied on. It was also the main plot area for sonic adventure 2.
Seaside Hill: Located near the ocean palace on another continent. This place was the starting area for all teams in sonic heroes.
Ocean Palace: A continuation of seaside hill. This place is a massive palace that has been mostly swallowed by sand and sea. You can also find turtles carrying massive land parts on their backs here.
Bullet Station: One of eggman's bases in sonic heroes. This is where the heroes first begin to discover that they wernt really battling eggman, but it was metal sonic.
Frog Forest: Located on green island, this place has all sorts of diffrent frogs. Once startled, the frogs will begin to croak loudly and summon rain to make the plants grow faster.
Hang Castle: Located in the haunted forest, this area was accessed in sonic heroes. It, as it's name suggests, is a haunted castle.
((Look at the map for any other area I missed or didnt put down. You may go to any of these locations or areas on the map pics as well.))