18 free things to do in Philly...A boon for budget travelers, Philadelphia is packed with American history. Here are all the attractions—from the United States Mint to the Liberty Bell—families can experience for free.
The United States Mint in Denver mints quarters, dimes, nickels and pennies. The Mint offers free tours of its facility Monday - Thursday. The U.S. Mint in Denver is one of four mints in the country producing coins.
In 1792, The Coinage Act created the Mint. "The primary mission of the United States Mint is to manufacture and distribute circulating coins, precious metals and collectible coins, and national medals to meet the needs of the United States" and "also maintains physical custody and protection of the Nation's gold and silver assets (...) The United States Mint operates six facilities across the United States" (http://1.usa.gov/JEklmO).