Iconian gateway
The Iconian gateway was a technology developed by the ancient Iconians, whose underlying principles remain well beyond Federation science. The gateway allowed instantaneous travel over enormous distances, at least 70,000 light years. Physically the gateway appeared literally as a "door", either suspended in space or surrounded by a frame, through which was the destination. An individual could simply step through the gateway as they would an ordinary door and emerge on the other side. The gateway network allowed the Iconians to travel throughout the galaxy without the use of starships.
Only two Iconian gateways were known to have survived the destruction of the Iconian civilization, both of which were later destroyed. The first was found in 2365 inside the only remaining structure on the surface of Iconia, and was accidentally activated by Lieutenant Commander Data as he was investigating the Iconian controls. The gateway apparently acquired possible destinations automatically, including the USS Enterprise-D and the IRW Haakona. The Enterprise away team used the gateway to escape, destroying the facility behind them to prevent it from falling into Romulan hands.
The second gateway was discovered in 2372 by the Dominion inside a stone ziggurat on the planet Vandros IV in the Gamma Quadrant. A group of renegade Jem'Hadar seized the gateway for themselves and re-activated it using equipment stolen from Deep Space 9. It was believed that they intended to use the gateway to foment an insurrection and mount a takeover of the Dominion. If they succeeded, the rogue Jem'Hadar would then gain the ability to move a force of any size onto any planet in the Federation or Dominion alike. Therefore, a joint Star Fleet-Jem'Hadar team, led by Benjamin Sisko and Omet'iklan, successfully retook and destroyed the gateway. This second gateway generated some type of interference that prevented the functioning of energy weapons in its vicinity.
Previous to its destruction, the gateway led to Bajor (two different locations on the planet), Cardassia, Dozaria, Earth (Paris and San Francisco) and Volan III.
