Just in case you were wondering where the famous columns were, here are some. I couldn't find a good picture of the Temple of Poseidon with caryatids (columns in the form of Greek maidens).
Bernini's colonnades at the Vatican. Ok, they're not really that ancient, but I like Bernini.
The columns of Parthenon Acropolis, Athens, Greece
And here's the Corinthian (flower basket) capital to a missing column. (The coliseum, Rome)