Tourism in Italy always offers infinite resources, from the historical cities like Rome, Milan and Venice to the beautiful beaches of Sicily and Sardinia, the possibilities are endless.

In addition, virtually all regions allow both to enjoy the natural beauty is to explore the historical memory of the place where we are.An example that may be worth for all is surely the one of the "trulli" in Puglia, in the south of Italy. The "trulli" are located mainly in the area of Bari, especially in the city of Alberobello and are precisely the construction that maintain their appeal over time and their usefulness.

"Trulli" are stone buildings, specifically in dry stone method of construction is typical of areas of the south, they are cone-shaped construction those have prehistoric origin and are typically located in central southern Puglia. The oldest "trulli" in Puglia currently date back to the sixteenth century, and are located in the Plateau of the Murgia. Trulli are essentially buildings that were used for housing the family of circular walls were constructed on the outside wall with a very high and very thick shape. This feature, combined with the fact that there were few openings in the wall excluded the central hole to secure the replacement of indoor air, makes it an example of green building, using all the elements that are currently being taken for the thermal insulation and energy saving.

The circular wall is completed with a cover pseudo dome, a self-supporting structure comprising a series of concentric steps arranged in horizontal slabs falling more and more as we go up. Each row is completely autonomous and statically balanced with the lower element of guarantee for both security and for insulation. The roof is also composed of two layers, the inner limestone just described and the other one which is the actual roof and is composed of thin slabs called "chiancarelle" those ends with a key.

The "Trulli" began as a typical peasant's house was used as a tiller of the ground on behalf of the master, Butted, which could be inside the bed and at the same time keep the tools of his work. This use is evidenced by the presence of numerous niches on the wall which were used as bedding for children, as there was sufficient space within the perimeter of the house. Obviously, the "trulli" were not always adequate to the needs of the family, especially if large structured as a single floor of living space, so in many cases proceeded to the attic to retrieve in living space. One of the characteristics of the "trulli" is to be lit for little obvious structure, were used for what many mobile with mirror that reflected light from the slits and the entrance door that was usually always kept open.

Given their historical importance, architectural and historiography the "Trulli", in particular those of Alberobello which is the country with the highest concentration of these buildings, have been declared World Heritage by UNESCO in 1996.