Landwasser Viaduct ...

... at Filisur in the Canton of Graubuenden in eastern Switzerland, as it appeared on our TV monitor this afternoon.   This,* as it happens,  is only 30-40 kilometers south of the village of Churwalden *, where I spent three years (between 1962 and 1967, one as a student and two as a teacher) at the Albert Schweitzer College--an international institution with only 30-40 students.
*Page down to reach the map (click to enlage it)--Churwalden is at the top left.   It is 12 kilometers from Chur, the Canton capital, up a narrow valley .