Cook Islands 20 dollars 2023 Famous Islands - ALCATRAZ - 3 oz silver coin Alcatraz, the small island in the San Francisco Bay, is one of the most visited tourist destinations in the world. During the Civil War (1861-1865), a prisoner of war camp was established on the island. From 1934 to 1963, Alcatraz served as federal prison and house some of the USA most notorious criminals, like Al Capone. Not one prisoner managed escaping Alcatraz alive. With the special smartminting technology you can see the hights of the prison on the coin. A beauty! Coin Metal: 999 Fine Silver Coin Weight: 3 oz Coin Finish: Proof, smartminting technology Coin Diameter: 50mm Coin Denomination: 20 dollars Year of Issue: 2023 Coin Mintage: 750 Country of Issue: Cook Islands