The World Terminus is a location from Kingdom Hearts.
Found deep within the End of the World, the World Terminus is a series of pillar-like structures spread over what appears to be a vast empty space. Upon each pillar is a beam of light that acts as a terminal to an area within one of the worlds Sora has previously visited. Also on each pillar is a sphere of light enabling travel to the previous pillar and to the next pillar, the latter appearing only after one has entered the terminal. The final pillar has what appears to be a terminal of flame that leads to Hollow Bastion, which disappears following Sora's departure therefrom, leaving behind a hole leading to Bald Mountain and the boss battle against Chernabog.
At first, every terminal is a blue color. If you have sealed that world, it is a purple color(Meaning only Atlantica, Olympus Coluseum or Halloween town could be blue). The only exception is the last terminal, which is always green.
Each terminal takes Sora and his party to a location from each world (meaning Monstro is not included). The first pillar takes Sora to the Third District in Traverse Town. There he must battle more powerful versions of Heartless there. Afterwords, Sora recieves the Brave Warrior item (originally obtained by defeating the Guard Armor) and the door to the First District is unlocked. However, taking it leaves the terminal. The same pattern follows for all the other terminals, with the exception of the green one. In order, Sora is taken to Traverse Town, Wonderland, the Olympus Coliseum, Deep Jungle, Agrabah, Atlantica, Halloween Town, Neverland, Hollow Bastion, and the Hundred Acre Wood. In the Atlantica and Halloween Town ones, Sora is in his proper form. Upon completing the terminal, Sora receives a copy of the item he received by beating the boss of that world (with Deep Jungle yielding the White Fang and Agrabah yielding the Ray of Light).
On the first time entering hole on the final pillar, Sora is brought to where the Heartless are being created before going to Bald Mountain. On all other occasions, Sora is taken straight to Bald Mountain.