PBS
Pbs: The Buildings of the Acropolis
A description of the buildings of the acropolis of Athens - the Parthenon and Erectheum.
Other
Sweet Briar College: Athenian Acropolis, Greece
An explanation of the term "acropolis" as well as a description of how the acropolis was used in classical Greece. Also contains extensive information about the Parthenon and Erechtheum, which were built on the Acropolis.