Anti-Gravity Gondola

Background
The Forerunners created large Anti-Gravity Gondolas that travel by utilizing anti-gravity technology to ferry individuals over long distances that are otherwise difficult to traverse. There are several iterations of the Gondola found throughout the Halos, one of which uses anti-gravity "tethers" below and above it. The only way for a person to get to the Library of a Halo is through one of these or the use of a teleportation grid.

Trivia

 * Gondolas only appear in Halo 2.
 * There is a glitch known as the Gondola Grunt. If you trap a Grunt on the second Gondola in the level Regret, its AI dramatically changes tacts.