Spaceship Earth is the iconic and symbolic structure of Epcot, the second of four theme parks built at the Walt Disney World Resort. One of the most recognizable structures of any theme park, it is also the name of the attraction that is housed within the 18-story geodesic sphere that takes guests on a time machine-themed experience using the Omnimover system. The 15-minute dark ride demonstrates to guests how advancements in human communication have helped to create the future one step at a time. Passengers journey back in time to witness the origins of prehistoric man, then travel forward in time to witness important breakthroughs in communication throughout history—from the invention of the alphabet to the creation of the printing press to today's modern communication advancements, including telecommunication and mass communication.