Looking for a quiet, private-ish, romantic location in Montreal to propose to my partner.

Hello! I am from Vancouver and will be on a trip mid May that will take us to Montreal for awhile. My mom is from Rosemere and Montreal has always held a special spot for my partner as she and her late mom had a special trip there when she was young. I am looking for any locations that locals may know that would be quiet and beautiful and not at the end of a huge hike. We will be celebrating our tenth anniversary and we’ve discussed this happening many times so there’s no real mystery in what the answer is going to be. So I’d like to surprise her still by being in a nice location we can remember forever!

Thanks

EDIT: way more suggestions than I was expecting. Thanks for all the help. Just at work now so I will be checking more throughout the day. Much appreciated.