Steve
Steve asked Lois McMaster Bujold:

Have you noticed? If you have read some of the "Rivers of London" series by Aaronovitch, you are aware that there really are multiple hidden rivers under London. They were once open rivers which have been built over or assigned to underground culverts. *Discover Magazine*, November/December 2021 issue, has an article by Natasha Khullar Relph, which explains how the city is bringing them back above ground again.

Lois McMaster Bujold London isn't the only old European city to have this -- Zagreb is another -- but cool about the article.

Ta, L.

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