This tradition goes back at least as far as the Yerkes Observatory in Wisconsin (the best in the world, a century ago), which was paid for by the builder of the Chicago elevated railway.

ECONOMIST: Telescopes are getting bigger, better and less tangible

The airport, the two main rail stations, an elevated railway and all motorways into the city will be shut.

CNN: Genoa braces for G8 summit

Five new platforms, an elevated railway, a new station entrance and a new train depot are among the improvements laid out by Network Rail.

BBC: Station area's ?4.3m cash boost

Now the houses were smaller, and there was room behind them for dilapidated bits of an old elevated railway.

NEWYORKER: Brooklyn Circle