Alcatraz prison, in the middle of San Francisco Bay. The facility’s maximum security procedures meant that it cost $10 per prisoner per day - the average in other prisons was $3.
BETWEEN THE ROCK AND A HARD PLACE
Since its inauguration in 1981, the Escape from Alcatraz Triathlon has included a 1.5-mile swim from the island, proving that it is possible – although the competitors benefit from wearing proper wetsuits.