Okay, here's a question for my fellow travelers. If you want to take a day or overnight trip from Rome and only want to travel by train, what are your best options? For the sake of limiting this question let's say it has to be within 1.5 hours train ride from Rome.
I'm especially interested in lesser known places that will still have some appeal to a tourist, that is... views, dining, history, architecture, art, festivals, markets, local craft, etc.
For the sake of making this a good resource to all travelers let's include a short description of the town and how to get there with each suggestion. (for instance... don't just post "Ostia Antica", give us some details and maybe a link to pictures)
I'll start by posting a link to my trip report of Orvieto... a VERY well-known hill town in Umbria that is very charming. It's easily reached in about an hour by train from Termini on the main rail between Rome and Florence.
The more obscure the better!!