Clear Cathedrals (they can be clear Citrine or clear Smoky) are referred to as Lightbrary Cathedrals. These crystals have doorways in their castling formation. To travel into the crystal, simply relax and gaze into the doorway. Once your mind, body and spirit are ready, you will see the doorway open and your consciousness will be drawn into the crystal. From there you can travel into different chambers and receive information that you are ready for at that time. You may also travel in inner and outer spacial dimensions in complete safety within the crystal.