The term ALPINE FEATURE is composed of three crossword solutions: ARETE (5 letters), YODEL (5 letters), and ECHO (4 letters). ARETE is a sharp ridge or crest on a mountain, YODEL is a form of singing characterized by rapid changes in pitch, and ECHO is a sound wave reflected off a surface. All three of these terms are associated with the Alpine region, which is located in Central Europe and is home to some of the highest mountains in Europe.