Our guide, Wendy, a National Park Service Ranger, pointed out the hole chipped in the concrete back wall of the cell as she explained how prisoners John and Clarence Anglin and Frank Morris managed to escape from Alcatraz in 1962. It turns out theirs was the only attempt that might have been successful during the three decades Alcatraz served as a maximum security Federal prison. “Might,” because though they managed to get off the island, no trace of them (dead, or alive) has ever been found. One other prisoner did manage to swim to the mainland that same year, but he was so exhausted he collapsed on the rocks and was promptly re-arrested.
Alcatraz view and Hornblower Hybrid with wind turbines