Coupons were introduced in 1894 when Asa Candler bought the Coca-Cola formula for $2,300 and gave people coupons that he had written out to receive a free glass of coke.

The oldest roller coaster in the world is the Leap-The-Dips roller coaster located in Lakemont Park in Pennsylvania. The roller coaster was built in 1902.

There are 21 "secret" highways that are part of the Interstate Highway System. They are not identified as such by road signs.

AMAZING FACTS