Thomas Pesquet posted a photo:

Traverser la terre en :boat: à l'aide d'un canal (Corinthe ici), et sa réciproque : traverser la mer à l'aide d'un pont !
:gr:
The sea: sometimes humans want to cross it on a bridge, sometimes humans want to stay in their boat. An exercise in subtraction, the Gulf of Corinth in positive with the Corinth Canal, and the same sea in negative with a bridge passing over it.

Credits: ESA/NASA–T. Pesquet

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