Federal Reserve Bank of New York

Attention, money worshippers: the best reason to visit the Federal Reserve Bank is to get a chance to ogle the facility’s 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 here (the only way in) will also teach you a lot about the US Federal Reserve System. You can also browse through an exhibition of coins and counterfeit currency. Beware that your passport or other official ID, as well as reservations – which the Fed suggests you make an annoying full month in advance – are required for the comprehensive tour.