It's a trullo! A trullo is a traditional stone dwelling with a conical roof. This style of construction is found only in the region of Puglia (called Apulia in English), primarily in the Itria Valley area, particularly the town of Alberobello. Trulli were generally built as homes or storehouses. Traditionally, they were built without any cement or mortar. They are found in the countryside throughout Puglia. The one in this photo is is an abandoned specimen located in a field next to my house.
Compliments to Homebody at Heart who correctly guessed that this was a view from the inside of the trullo looking up through the roof. Great guess!!! And thanks to everyone who sent in their ideas!
For photos of some great looking trulli check out this link.