Places I can go to with my Grandma

My family is in Chennai and I try to spend a weekend with them every month. Here on a longer vacation thanks to New Year. I want to spend more time with my grandma - she can walk short distances but I have a wheelchair to make it more comfortable for her. I want to take her out to places in Chennai which may not be too crowded, wheelchair friendly and feels interesting to her ( she is 80 but is comfortable with multiple languages and reads news regularly). She is just constantly on her phone watching YouTube and I want to give her a break from that. Genuine recommendations please.