https://4.bp.blogspot.com/-YESYA7lGd7Y/XKED-IJX7vI/AAAAAAADhUk/EmLcMwu1jUYkFU_NiWNdetwx5BHPpubGACLcBGAs/s1600/Hole31.jpg
Okay, so this isn't what it usually means, but the third eye is said to be the gate to a realm of higher consciousness.
https://www.kristenbjorn.com/files/videoclip_images/552/large/1435575507017.jpg
And it's often associated with out-of-body experiences.
https://2.bp.blogspot.com/-fIU5n0sSQAA/W1_M845uSoI/AAAAAAADTb8/GNIuegAMoAg2zf-coTDMB-B3iw8RAv7PgCLcBGAs/s1600/Hole1327.jpg
Where is it located? Some say on the forehead, between the eyebrows but a little bit higher. Others disagree.
https://3.bp.blogspot.com/-dRlLf67pT9Y/Ww9piqRh4II/AAAAAAADPqQ/S7W6GrcwUucCYLL2hI9wAvhHkv61olwCwCLcBGAs/s1600/Hole1295ethanhunter.jpg