For culture , there 's music at Tanglewood in Lenox , less than 20 miles away ; dance at Jacob 's Pillow in Becket , 28 miles away ; song at the Berkshire Choral Festival in Sheffield and at the Berkshire Opera Festival in several sites ; art at the Norman Rockwell Museum in Stockbridge , 15 miles away ; and theater at the homegrown Barrington Stage Company , which developed the Broadway hit '' The 25th Annual Putnam County Spelling Bee , '' in Sheffield .