Two burly Swiss men wrestle in front of a rapt audience during the Unspunnenfest. Held in and around Interlaken, this festival was first staged in 1805 on the grounds of Unspunnen Castle. The highlight of this celebration of folk dancing, yodeling, and Alpine sports is the Steinstossen, the throwing of the Unspunnen Stone, a 184-pound (83-kilogram) glacial boulder.

This year the Unspunnen Festival will be held September 1-3.

(Text adapted from and photograph shot on assignment for, but not published in, "Switzerland: Europe's High-Rise Republic," July 1969, National Geographic magazine)