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Marine museum with displays that cover shipping, fishing, geography, and the history of Dieppe, there is also an aquarium
This is a small but well-presented museum that has taken over the Italian-style Petit Theatre. Fascinating film with interviews with those who were there. You will need about an hour to watch it all and look at the museum.
the oldest house of the city.
It's a wetland reserve managed by APEI (L'Association de Parents d'Enfants Inadaptés de Dieppe), you'll find the ecology well documented, and a host of interesting artworks around the meadows. If you don't want to ride from Dieppe, you can hire bikes here and head on south along the Avenue Verte.