Babylon Garden

You may be looking for the alternate course playable in the Babylon Story, called Sky Road.

Babylon Garden is the very last course in Hero Story Mode in Sonic Riders. This track is only playable as Sonic in story mode, but playable as any character in a normal race.

History
Babylon Garden is a floating island that was home to thieves known as the Babylonians. Because of the crimes they commited they invoked the wrath of the Gods who cast the islands into the depths of the earth.

Afterwards the Babylonians left their lost world scattered for all time, but it is believed that the treasure of the Babylon Garden still remains on the island.

Earlier history shows that the Babylonians were more of an alien race which later became an organisation of bird thieves, the ancestors of the Babylon Rogues.

The current Babylon Rogues are decendants of these Babylonians.

Sonic Riders
Wave the Swallow planted a bomb on the bottom of Sonic's extreme gear, the Blue Star. In the final race of Eggman's grand prix, she blew up Sonic's board, allowing Jet to win. Using the seven Chaos Emeralds attained from winning, and an ancient square key, Jet used the power of the emeralds to rise Babylon Garden out of the sands. Eggman plotted the entire thing out, and took Jet's key and made haste for Babylon Garden. The Babylon Rogues and Sonic's friends, chased after Eggman after Amy herself chases Eggman and latches on to his EggMobile as they head for Babylon Garden. Sonic, Tails, and Knuckles pursue Eggman on the Tornado. Tails gives Sonic a new board, the Blue Star II, and Sonic and Jet race each other to defeat Eggman. After the races, Sonic takes the key back from Eggman and gives it to Jet. Jet was suprised that Sonic gave it to him. After Sonic leaves, Wave takes the key and runs of to the door it opens, and they race in for the ancient treasure they wanted the whole time.

Sonic Riders: Zero Gravity
In Sonic Riders: Zero Gravity it is revealed that Babylon Garden is actually a very advanced space craft, and that Babylonians are actually aliens. When the ancient Babylonians crash-landed towards earth they released their engine units, the arks of the cosmos, and landed in orbit. After that they waited for years for their engine unit to fall to earth, after several years one unit crashed to Earth and they retreived it and sealed it in the gigan rocks.

A long time later when only three Babylonians were left (Jet and co.) the rest of the arks fell from space, one located by Eggman and put in the mother computer making the meteor tech robots go haywire! Another was found by Tails and given to Sonic,a third was found by CDR-HD who was the learder of the robots making them follow his orders they tried to hunt down the rest of the stones. The final one was found by Amy, and the one sealed in the gigan rocks was found by Jet. The amount of time Babylon Garden was floating it eventually got buried by the sand in the desert almost completly wrecking Babylon Garden.

Overview
This course starts at the top of a huge ramp that you can never return to after you jump off it. The course is a long, snaking track above Babylon Garden. It is stormy, and jets are racing around in the sky. In the middle of the level, one jet blows up a section of the track and creates a turbulence that you must ride on. At the top, you fall and catch a jet and ride it to the other side of the level. This course includes two grind rails, two sets of air rings, and two power type shortcuts. In Story Mode, only Sonic is playable.

Trivia

 * Even though the course is called a garden, it hardly has any plants of any kind, and is even revealed in Sonic Riders: Zero Gravity to be a flying spaceship, and the Babylonians are aliens.
 * This level contains the game's only loop-de-loop, which after the first shortcut. You can enter it through the left arch or the middle arch if your character is not a flying type.
 * There is an alert, possibly out of Babylon Garden's security system, that stems out whenever a large amount of turbulence appears. The system is voiced by Bella Hudson.
 * Babylon Garden is similar to Angel Island.
 * In actual history there is a place called Babylon Garden but called Gardens of Babylon instead, it was in Mesopotamia (Iraq) until it was destroyed.