Plans fell through – Need help with a 4 day mini-moon

Hello sub, I'm new here. My wedding is quickly approaching and my honeymoon plans got changed.

We're getting married around the Toronto area, and originally we were going to fly out the next day from Toronto International. We have from Sunday to Wednesday to go somewhere and then be back before both of us have to go back to work (can't be changed).

I would really appreciate some ideas for a destination where we can relax in a cozy setting and maybe have one or two activities to do outside the room. We are a young, active couple and are interested in fun physical activities. Less so tours and museums.

Unfortunately we're getting married before the ski resorts have snow, otherwise I would have chosen one of the many good ones in Canada. We're open to flights 4 hours or under, but given the timeframe, we'd rather not spend lots on travel for such a short trip.

Let me know if any other details may help. Thank you for your time.

Edit: We are both American citizens looking to exercise our passports once married.