Trivia: An Oyster Card will help you ride public transportation in what city?
Berlin
Honolulu
Sydney
London
Correct Answer: London
So why is this answer correct? : Oyster Cards were introduced in the United Kingdom in 2003, and since then more than 86 million cards have been sold. They’re used to pay the fares on the London Underground, the city’s buses, the Docklands Light Railway, the London Overground, and most National Rail services in the area. They’re called Oyster Cards to suggest security and value, like an oyster with a pearl, as well as to reference the oyster beds of the River Thames.