Teleportation from Circle to Circle

When you are standing in a permanent teleportation circle, you can cast this spell to temporarily link your location to that of another permanent teleportation circle of your choice whose sigil sequence you know and that is on the same plane of existence as you. A shimmering portal, 15 feet in diameter, opens within the circle you are standing in and remains open until the end of your next turn. Any creature that enters the portal instantly appears within 5 feet of the destination circle or in the nearest unoccupied space if that space is occupied.

Creatures on the other side of the portal are able to use this gateway to pass through in the other direction, as well.