The best reason to visit the Federal Reserve Bank is the chance to ogle at its high-security vault – more than 10,000 tons of gold reserves reside here, 80ft below ground. You’ll only see a small part of that fortune, but signing on to a free tour (the only way down; book around six weeks ahead) is worth the effort.

While you don't need to join a guided tour to browse the bank's museum, which includes an interesting exhibition on the history of money, you will still need to book a time online. Bring your passport or other official ID.