
Naturally, there is a hole in the fence next to the sign.

A very nice and relaxed way to see the sights on a sunny day: no crowds, no lines, no tickets. (Eventually an Italian family joined us there.)



Here S, our railroad engineering expert, explains how the grooves in ancient Roman roads carved by the wheels eventually forced standardization of the distances between the wheels in carriages and later determined the distance between the rails in railroads (and why, according to a popular "MIIT" legend, this distance is a few centimeters wider in Russia).

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