Basic example without a landmark in the object's inventory, while facing the avatar towards the center of the region:

default
{
    touch_start(integer num_detected)
    {
        llRequestPermissions(llGetOwner(), PERMISSION_TELEPORT);
    }

    run_time_permissions(integer perm)
    {
        if (PERMISSION_TELEPORT & perm)
        {
            vector region_pos = <100, 130, 40>;
            vector look_at = <128,128,40>;
            llTeleportAgent(llGetPermissionsKey(), "", region_pos, look_at);
        }
    }
}