Superman has the ability to see through solid objects.

He can control the degree of this power, allowing him to see through layers of things, one layer at a time. When used he can simply see through objects or it can acts like an actual X-ray, allowing him to see the skeletal structures of things like a medical x-ray. Unlike real X-rays, no radiation is used so it is not harmful in any way. He can use this power on a single item or do a wide scan seeing through multiple items.

Superman can combine this power with his other visual powers. He cannot see through led.