Subtractive architecture has one unforgiving property: there is no correcting a mistake. Everything below was carved from the top down, in solid rock, by people who could not revise. Here…
Two kinds of place are worth visiting: working research sites at altitude, and historic instruments in cities that show how the work was done before electronics. Here are eleven of…
The difference between a preserved windmill and a working one is the noise. Inside a mill under sail, the whole building shakes, the gears roar and flour comes out warm.…
The engineering logic is entirely practical, and once you know it the buildings stop looking quaint and start looking sensible. Here are eleven still standing.
1. The Kapellbrucke, Lucerne, Switzerland…
These are not clocks with decoration added. They are astronomical instruments that happen to display the hour, built when the position of the sun and moon mattered to planting, sailing…
An aqueduct is mostly invisible. The famous arched bridges are the short sections where a valley had to be crossed; the great majority of any system ran underground or along…