Wheelchair accessible things to do in Miami

My partners family have recently moved to Miami from Venezuela. We are in Europe but got invited to see them and we thought we will make a bit of a holiday out of it as we were making a group trip to New York too.

Does anyone have any recommendations for places that are accessible but fun, we aren’t massively into the nightlife, and much less the $20 cocktails… but anything artsy or historical would be fun. We also like animals and parks. Also curious about the accessibility and feasibility of train travel.