Less than an hour from Siena is the Abbey of San Galgano, a Gothic architectural masterpiece that lost its roof in 1550 and has been abandoned ever since. The abbey is set in a beautifully secluded area and can be quite peaceful to visit during the day. You're free to roam through these recently restored ruins or even take a short walking path leading up a small hill to the Capella di Monte Siepi (Chapel of Monte Siepi). It houses a very special relic: a real "Sword In The Stone" that dates back to the 12th century. Legend has it that Saint Galgano Guidotti thrust his sword into a rock outside his home and it's been there ever since, with a small church subsequently built around it.