ON a SUNNY SUNDAY in August, we went to Sisikon and Bauen, by Lake Uri (Urnersee) in Switzerland, to hike two beautiful parts of the Swiss Path (Weg der Schweiz). The Swiss Path was constructed to celebrate the 700 anniversary of Switzerland in 1991. The first part we hiked, from Sisikon to Tell Square, includes hundreds of steps, up and down, and is partly steep…