The Teleporting Stones

General
Located through out the world are these strange Stonehenge like structures. A large single rock sits in the middle of the stone circle. Touching the rock activates the circle causing it to switch places with one of the other circles. By default the east and west circles switch, but if a suitable magical anchor was brought, the circles could switch with other circles.

The rocks of the circle vary in size along all dimensions, some being mere slivers, and some being large enough for a war forged to comfortably sit upon. The stones are magically immovable and immune to damage.

There is a strange aura in the circle. all who enter can feel that something is special about that place. a dc 15 perception check might result in a PC noticing that the wind doesn't blow in the circle, or that the grass is a slightly different color, or the rain is much lighter inside the circle.

In the East
the eastern circle is about 2 days journey east and 1 day north east. camping in or near the circle will result in a night attack by several cockatrices

In the West
the stone circle is nearly 10-14 days around the outer valley, slightly on the north side in the mountains. spending too much time here can draw the attention of Shadowbeasts or shadows