Around 10 km from Montreal, in Lachine, is this huge park. Actually a couple of parks, and a couple of museums.
It is nice bike ride on bike trails along the river.
Parc Rene-Levesque is huge, and having bike to see it all is actually quite convenient. In addition to the greenery, the park has a number of large and interesting sculptures by local artists. From a large engraved stone to metal structures. And all on a thin sliver of land jutting out into the river.
To the north of that park is another similar sliver of land that has a park and houses the Lachine Canal Historic Site.
That too has some sculptures scattered around the park, and the bike trail there goes next to the old Lachine Canal, with interesting looking houses on the side.