Large-scale structure of the universe.
3-D Movie: Fast Flight (60 Mb !!!)
"A 3-dimensional visualization of the Millennium Simulation. The movie shows a journey
through the simulated universe. On the way, we visit a rich cluster of galaxies and fly
around it. During the two minutes of the movie, we travel a distance for which light
would need more than 2.4 billion years."
Source: The Millennium Simulation Project @ The Max Plank Institute for Astrophysics
.