I've found a place called the connection while doing a queens mission in Venus, it's located at The Citadel near to the Vex confluence for the Watcher's eye mission. At the other end of the broken "bridge" next to the confluence, there's a concave circle in the wall defended by two Axis minotaurs (lvl 20) and at the right side are some discrete stairs. Then all the Vex in there are lvl 22. At the bottom of the corridor you find a giant helix beam that comes from the sky, it have a shield similar to the Templar's one, and is totally unbreakable, I'm lvl 27 and I do nothing to it, I suppose it's some kind of space elevator. Any ideas? Has anyone been there before because I found nothing on the Web.