The ‘trulli’ of the region around Alberobello in Puglia, south Italy, are one of the most amazing examples of vernacular architecture anywhere in the world. Built of local stone, unmortared, the courses form a dome in the interiors using the technique of corbelling (setting the courses slightly further in each time). This one was a beautiful rustic one, not quite as refined as some others. They might look like the homes of trolls, but they’re well suited for the heat of summer and cold of winter. The most concentrated area of trulli houses in Alberobello has been designated a UNESCO world heritage site for the uniqueness of the structures. A few masons still are able to construct and repair these remarkable buildings.