Number of people worldwide who visited amusement parks in 2007:

758 million
According to Pricewaterhouse-Coopers, amusement and theme park attendees spent about $24 billion in 2007.
Source: New York Times, 4/24/2010

  Average price per acre paid by The Walt Disney company in 1965 for the land that became Disney World:

Disney paid a total of $5.5 million for 27,443 acres outside of Orlando.
Source: Atlanta Journal Constitution, 9/29/1996

Premature Baby at Pan-American Exhibit in Buffalo
Number of years Coney Island displayed infants in incubators:

From 1903 until 1943, Coney Island had an Infant Incubator exhibit showing premature babies born in New York City hospitals. The babies were attended to by nurses in a sterile environment, with survival rates equal to hospitals of the time.
Source: The New York Times, 12/13/1998

Photo: Nicasaurusrex (2007 flickr) No alterations of any kind.
Number of people who visited Europe's 20 largest amusement parks in 2006:

59 million
According to Economic Research Associates.
Source: New York Times, 7/4/2007