A shocking discovery has rocked the history of Alcatraz, the infamous federal prison known for being impregnable. During museum expansion work on the island, the FBI uncovered a secret tunnel not shown on any official plans. This passageway, constructed with extraordinary solidity and complexity, bears no resemblance to the rudimentary tunnels prisoners used in escape attempts. Its existence raises unsettling questions about who built it and for what purpose, opening a range of theories from espionage operations to covert psychological experiments.

Experts determined that the tunnel’s materials date back to the 1920s, long before Alcatraz became a federal prison in 1934. This rules out inmate construction and suggests a more enigmatic origin. The tunnel, reinforced with sophisticated structures, doesn’t appear in any escape records, not even in the famous 1962 case involving Frank Morris and brothers John and Clarence Anglin. Its purpose seems to extend beyond a simple escape route.

At the end of the tunnel, investigators found a sealed steel door leading to a hidden chamber. Inside, they discovered documents, maps, a clock stopped at 2:17 a.m., and encryption devices similar to those used by the CIA. The space resembled a secret command center, with indications that someone had lived there for an extended period. “Finding something like this at Alcatraz is like discovering a time capsule of clandestine operations,” said historian Michael Esslinger, an expert on the prison’s history. Theories about its use range from a headquarters for espionage activities to a purported psychological control project known as “Warden’s Shadow,” or even a secret transshipment point during the Cold War.

One intriguing hypothesis suggests that the tunnel wasn’t designed for prisoners to escape, but rather to smuggle people or sensitive materials onto the island. Some former Alcatraz guards, like Robert Baker, who worked there in the 1950s, recalled strange noises coming from the area near the laundry room in C Block, possibly connected to the tunnel. “We always thought it was old pipes, but now I wonder if there was something more,” Baker said in a recent interview.

The discovery of skeletal remains in the tunnel added to the mystery. Alongside the remains, coins, maps, and notes were found suggesting the presence of a fourth person in the 1962 escape, someone who doesn’t appear in official records. Although only Morris and the Anglin brothers are known as the protagonists of that legendary escape, new evidence points to a more complex plan, possibly involving the complicity of guards or infiltrators. A letter sent in 2013, purportedly by John Anglin, stated: “We managed to escape that night, but it was much more difficult than planned.” These words reinforce the theory that the tunnel may have been part of a secret escape plan orchestrated with outside support.

Alcatraz, far from being just a prison, appears to have been an epicenter of covert activities. Experts speculate that the 1962 escape could have been a security test designed by the U.S. government to evaluate crisis response. “The prison was a perfect place for experiments, not only with inmates, but with intelligence tactics,” explained researcher Sarah Mitchell, author of a book about Alcatraz. The presence of encryption equipment and documents in the tunnel suggests that the island housed operations beyond mere confinement.

The FBI continues to investigate these findings and has issued a public appeal for information from witnesses or any leads that might shed light on Alcatraz’s secrets. This discovery not only rewrites the prison’s history but also reignites the fascination with the 1962 escape, one of America’s most enduring mysteries. What appeared to be a simple prison on a rocky island may have been a chessboard for Cold War strategies, leaving questions that may never be fully answered.