San Martino, the main village of the municipality, is located at 1,127 m and is considered the cultural centre of the Val Badia valley. Mentioned for the first time in 1260 in connection with a church, San Martino is not only popular for its large number of hiking possibilities: surrounded by meadows and forests as well as an impressive Dolomite scenery with mountains such as the Sasso Putia, San Martino belongs to the Puez-Odle Nature Park.

From a cultural viewpoint, San Martino strikes by its Ladin Museum "Ciastel de Tor", illustrating the history of the almost 30,000 inhabitants of the Ladin Dolomite valleys. Moreover it focuses on topics such as geology, archeology, legends and handicrafts. The Ladin Museum is hosted by Ciastel de Tor, the symbol of the Ladin-speaking area. Aiming at preserving the Ladin language and culture is, however, also the Ladin Culture Institute Micura de Rú, also situated in San Martino.

In winter San Martino first of all strikes with its appearance and its snow-capped Dolomite peaks. Numerous cross-country ski trails snake across the snow. Those, however, who prefer well-groomed slopes, are transported into the heart of the Plan de Corones skiing area by a ski lift with lower terminus about 1 km from San Martino. A shuttle service also takes you to the slopes of the world-famous Sellaronda in Alta Badia.