Lost World

Lost World is one of the levels featured in Sonic Adventure. It is located in the jungle in the Mystic Ruins. The area can only be accessed by two ways; through the main entrance during a tremor (Sonic), or through a vent at the back of the temple which can be unlocked by 2 stone keys (Knuckles). The level is cut into three main parts: a long and tricky maze with a chamber full of water, a passage with flaming arrows and mirrors, and a room with panels that can be walked on when aligned. The outside looks similar to the structure thing back at the Knuckles Tribe, while the inside looks more like a place where an ancient civilization used to be. Sonic goes through all three, while Knuckles goes through only the third. Skill and timing is required to maneuver this level.

Gameplay
There are five rooms with large and/or small bodies of water scattered across the stage. The first one has structures of snakes, which can swim around the lake for transportation, as if they were ALIVE! There second room has mirrors that can light up a dark room. The third one has a waterfall, which leads to a pond with stepping stones resting on the water, and an attempt to escape from a giant boulder headed straight for the character, kinda like Indiana Jones and the Raiders of the Lost Ark. The fourth has a wide, but small body of water surrounded by walls with spiky, hovering platforms, rotating cubes of fire, and mystic panels that you can control by jumping on a blue switch. To walk on the panels, you must connect a group of them with the switch, and once they are lit, you can walk on them. And finally, the fifth has two small ponds with a stone picture of Perfect Chaos destroying an unknown place, which probably explains what will happen in Super Sonic's story. There are a bunch of other things, too. What else is there, you ask? Well, for now, you'll have to see for yourself.