Typical Engadin village, situated on a sunny terrace overlooking the River Inn and the lower Engadin on the Austrian border. Of great interest is the late-Gothic hall church with polygonal choir built in 1515 by Bernardo di Poschiavo.

The municipality of Tschlin takes its name from the main settlement, which is located on a terrace on the left side of the Inn at an altitude of 1500 metres above sea level. In old documents, Tschlin appears under the name Ciline, de Sline, in vico Cilinis or Schlines. Until 1943, the German name Schleins was in use. In 1621/22, during the Graubünden conflicts, the villages around Tschlin were largely destroyed. The then relatively large settlement of Chaflur was never completely rebuilt. In 1652, a plot was purchased from Austria, but the border with it was only adjusted in 1868.

Not to be missed is the late-Gothic hall church with polygonal choir built in 1515 (possibly) by Bernardo di Poschiavo, who used parts of the existing sanctuary. The interior contains frescoes from the beginning of the 16th century: on the south wall of the choir, Mary Magdalene is portrayed in the presence of a bishop saint; on the east wall of the nave, on the other hand, there are St. Sebastian and other saints; finally, at the top there is St. James. On the keystone of the triumphal arch, the shroud of Veronica is painted, and on the west wall, scenes from the life of St Blaise. In front of the church is the Donna Lupa fountain from 1960.

Agriculture and forestry are an important source of income in Tschlin, with about one third of the workforce working in this sector. Most of the inhabitants, however, are employed in the third sector (services), which is due to the location near the border and the Acla da Fans customs exclusion zone.