United Kingdom – United Kingdom's capital is London
(Pronounced yoo-nye-tid king-duhm and luhn-duhn)
To remember the capital of the United Kingdom, use the following mnemonic:
The united Kings (United Kingdom) all had long johns on (London).

Interesting facts about London:
- Hidden Underground Rivers: Beneath the bustling streets of London flow several lost rivers, such as the River Fleet, which was paved over centuries ago and now serves as a storm drain where rushing water can still be heard near Farringdon.
- Roman Origins: The city was originally founded by the Romans around 47 AD under the name Londinium, eventually evolving over the centuries into the modern name we use today.
- The Elizabeth Tower: The famous landmark commonly known as Big Ben is actually just the nickname of the 13.7-ton Great Bell inside, while the structure itself was officially renamed the Elizabeth Tower in 2012.