Scientist Pete Kelsey and his team have 3D-mapped the entire island of Alcatraz, discovering Civil War secrets, prisoner escape routes – and looking at ways to preserve the island for the future.

Many believe that the tormented souls of those who suffered and died on Alcatraz still linger, unable to escape its rocky ...

The stories of former prisoners and guards add to the island's haunted reputation. Exploring the cold, damp cells gives a glimpse into the harsh conditions of the past. Alcatraz remains a ...