Epcot in Disney World.

Epcot in Disney World.

Doves and balloons fly around the geosphere Spacehip Earth, during the opening ceremonies for the EPCOT Center, Friday, Oct. 1, 1982. The geosphere weighs 15.5 million pounds and can hold 2,800 people per hour. The $1 billion themepark is designed to stimulate scientific thinking about the future. (AP Photo/Doug Jennings)