The panorama over the landscape around town is one of alternating plains and hills covered in woods of oak trees, cork, carob and Mediterranean brush that are home to martens and mountain goats, to eagles and falcons. Triei boasts some 1,200 inhabitants in the north-eastern part of Ogliastra and its name comes from tereiu: in spring the countryside is covered in a fragrant coat of intense yellow Spanish broom, known in local dialect as terìa. The economy is based on agriculture and grapes, from which quality cannonau wine is made. The area is renowned for the fine honey made by local beekeepers, especially the slightly tart arbutus honey. Local cuisine uses genuine products and ancient recipes to make culurgiones, macarrones de busa, pistoccuincasau, istacculas with myrtle, roast lamb, goat and pork. Among the crafts are rugs and bedspreads made on hand looms, wicker baskets, and arresojas made of bone.

First mention of the town in an official document dates to 1316. Another town in the same place was mentioned in a document from the previous century, but it was abandoned. It had been on the Osono plain, very near Triei. The nearby imposing Giant tomb is still there, a burial chamber of some 20 metres in length, brought to light in its entirety in 1989.