Mystic Ruins

Mystic Ruins is a fictional location and an "Adventure Field" in the video game Sonic Adventure and its remake Sonic Adventure DX: Director's Cut. A group of archaeologists are exploring the ruins of some ancient civilization. Unfortunately, they were not prepared for the crash landing of Angel Island. Some of the archaeologists have gotten themselves lost in the maze of the thick jungle that surrounds the Maya-like temple, whereas others have just gotten completely confused as to what happened.

History
A long time ago, the great Echidna civilization had their city placed in Mystic Ruins (though it was not known as Mystic Ruins at the time, obviously), but the Echidna chief became greedy and tried to get the Chaos Emeralds from their altar, hurting many small creatures known as Chao in the process. This angered their guardian Chaos, and he destroyed the entire Echidna city with the exception of their main temple. After this, Angel Island, which the altar was placed on, floated into the sky along with the surviving Echidnas.

Several thousand years later humans discovered the ancient temple ruins, and started some archaeological expeditions. Also, the small fox named Tails found that Mystic Ruins was a quiet location away from the city, and built a house/workshop there. Later a train station was also built there for easy transportation of archaeologists. During the event of Sonic Adventure, Angel Island crashed next to Mystic Ruins, startling the inhabitants, but it floated away again after the Master Emerald was restored. Mystic Ruins has not been seen since.

Main areas
The main area is large area with some buildings and trees. One side leads to a steep cliff into the ocean, and on the other side is a mountain with various caves. A hill is located in the eastern part of it.
 * Train station - A tall wooden building with stairs that leads to a stone bridge where the train waits for passengers to take to Station Square. Inside the building is a ladder that leads to a raft that takes people to the Egg Carrier.
 * Tails' Workshop - A small two-story house located on a hill. It has with a long biplane runway leading out into the ocean. The workshop is apparently connected to a cave beneath the house, where Tails works on his Tornado 2.
 * Lake - A small lake with a waterfall leading to it and a river leading into the ocean. A Silver Chao Egg can be discovered by pushing against a panel.
 * Caves - A small cave system that lead to an upgrade for Knuckles and the Mystic Ruins Chao Garden.
 * Chao Garden - A large grassy area on the side of a mountain. There is a lake and several large rocks lying about.
 * Windy Valley - An windy Action Stage where tornadoes easily form. The second part of the stage consists of floating paths high above the clouds.

Jungle areas
The jungle area is a maze-like area with many paths through a large jungle. Several archaeologists are lost there.
 * Big's Hut - A small wooden structure where Big the Cat lives.
 * Echidna Temple - A large maya-like temple that used to be he holy site of the Echidnas. It is the portal to Lost World.
 * Lost World - An Action Stage set inside the temple. It is extremely large, and one part somehow features an outside section that looks nothing like the jungle.
 * Sand Hill - A long desert slope with various ruins in it.
 * Final Egg - Eggman's large tower base, where he keeps his Egg Carrier. It is entered via a long tube in the jungle.

Angel Island areas
After Angel Island crashes in Mystic Ruins, most characters can access the island via a windy cave. The main area is a long corridor that leads to a large area where the Master Emerald can be found.
 * Master Emerald Altar - The altar where the broken Master Emerald is.
 * Ice Cave - A frozen cave that leads to IceCap.
 * IceCap - A cold, snowy mountain with many caves. The second part of the stage consists of a long hill for snowboarding.
 * Red Mountain - Another mountain of Angel Island, except this one is volcanic.