Portal

Portals are permanent teleporation effects that link many places in and outside Toril. The devices riddle Toril, numbering in the thousands easily, though noone has ever been able to determine the exact number of active portals, even in Faerûn alone.

A freestanding archway of some kind usually identifies the location of a portal, so those who cannot detect magical auras do not stumble into them accidentally. The portal itself is completely intangible.