At 45 minutes long, Chronos has no actors or dialog. The soundtrack consists of a single continuous piece by composer Michael Stearns. Filmed in dozens of locations on five continents, the film relates to the concept of time passing on different scales — the bulk of the film covers the history of civilization, from pre-history to Egypt to Rome to Late Antiquity to the rise of Western Europe in the Middle Ages to the Renaissance to the modern era. It centers on European themes but not exclusively. Other time scales include the passing of seasons, and the passing of night and day, and the passing shadows of the sun in an afternoon to the passing of people on the street. These themes intermingle with many symbolisms. —Wikipedia
Ron Fricke is an American film director and cinematographer, considered to be a master of time-lapse photography and large format cinematography. He was the director of photography for Koyaanisqatsi (1982) and directed the purely cinematic non-verbal non-narrative feature Baraka (1992). He designed and used his own 70mm camera equipment for Baraka and his later projects. He also directed the IMAX films Chronos (1985) and Sacred Site (1986). His most recent work was as cinematographer for parts of the film Star Wars Episode III: Revenge of the Sith (he was hired to shoot the eruption of Mt Etna in Sicily for use in scenes of the volcanic planet Mustafar). The sequel to Baraka, Samsara, is currently in production. —wikipedia
I'd just like to point out that Ron Fricke was the Director of Photography for Koyaanisqatsi, so while Chronos may not be as fully realized as that film, it is still visually stunning, a wonder to behold (at least, the blu-ray version is). It's still great to watch on its own, but it's mostly interesting as a precursor to Baraka, which is an absolute masterpiece on every level and far superior to Koyaanisqatsi.
A shameless ripoff of KOYAANISQATSI, only good for showing off the visual specs of an HDTV. Seriously, this consists of the kind of stock footage you see at Best Buy home theater displays, put together with no deeper meaning. Save your money and watch Godfrey Reggio's masterpiece that this bastardizes.