We have already seen some Isochronic maps here at Urban Demographics Blog. Here are a couple of travel time maps for rail mode in the US using New York City as a starting point (1800, 1830, 1857 and 1930). Via Nathan Yau.
Time to get from New York City to almost anywhere in the US, in 1857.
[Image Credit: the 1932 Atlas of the Historical Geography of the US, via Michael Graham Richard]
