Pompeii Villa of the Mysteries

[rsquare]

Can the Villa of the Mysteries be reached directly from the train station, or does one have to enter the grounds of Pompeii and reach it from inside the grounds? If the former, can one pay the admission to the site at the Villa?

[CoralReef]

According to my Pompeii TI map, the Villa dei Misteri is within the Pompeii site, and the gate there is exit-only.