Agriturismo Poggio Covili is a hotel located close to Bagno Vignoni, in Val d'Orcia, Tuscany. While I can't give you many infos about the hotel, this farm house has become super popular on social media for its cypresses street. Not sure why this one in particular is very popular, most likely because it's close to San Quirico d'Orcia.
There are many more cypresses streets in the whole valley, but in many you can't stop easily like in this one or maybe the owners don't allow people taking photos, and that's probably why this one has become so famous.
Like most popular spots, expect some people. Getting the perfect photo will definitely require a bit of patience.
Parking: there are some parking spots on the sides of the main road, they are not many, so you'll have to be a bit lucky.
Personal opinion: I would only recommend coming here if you are close to Bagno Vignoni, as it's just a 5 minutes car ride. I wouldn't come here specifically, as like I mentioned, it might be hard to find a parking spot and even if you find it, it'll likely be very crowded.
Best photo spot: While you'll want to take the photo in between the cypresses, my favourite perspective was on the side. From here, you'll also be able to see the house and the surrounding landscape.