What are the key characteristics of Barolo wine?

The "King of Wines", namely Barolo is a DOCG denominated wine, produced in Piedmont region, from the Nebbiolo grape. It has been known for a long time that wines from this region have a high tannin level that is not only responsible for their structure but also the aging potential. This complex wine bouquet includes the red fruits such as cherry and plum, floral aromas of rose and violet's and earthy notes of truffle and tar.