At the bottom of the Borgo road, you'll see a large stone monument that commemorates the "Innocenti" or the Innocents, locals murdered by Nazis in 1945 in the farmhouse on the opposite hill. The farmhouse is still there - abandoned and untouched with the exception of the memorial on the south side of the main house. It lists the names and ages of the killed, and is an austere reminder of the valley's tumultuous past.
This is an excerpt from a British blogger:
"The fighting in this [valley] was particularly fierce, bloody and merciless, a fact which is silently but grimly attested by the looming presence of a large stone that stands alongside the road threading its way through the Niccone valley. It both honours and mourns the innocent villagers who were rounded up and executed by burning in a barbaric act of reprisal in response to partisan activities in the region.
Of course, this happened nearly 60 years ago and, even though there are still people living in the valley who remember the atrocity, it doesn’t do to bear a grudge. At the other end of the same valley road, in the town of Lisciano Niccone, the sound of German voices can once again be heard in the bars and pizzeria. Some of them are on vacation, touring the region, others have bought holiday homes here. So, although their presence might suggest that the local people are prepared to forgive, the memorial stone bears permanent witness to the fact that they do not intend to forget."
The structures are deteriorating, and not safe to enter, but you can still see examples of daily life - shoes, mattresses, and a beautiful stone cistern.
2014 Update
A mudslide in the Spring of 2014 swept out the bridge and relocated the Niconne River. To visit the farmhouse, cross the river at Niconne and approach from the East.