Coming back home after 25 years

I left for Australia just after 7th standard and it’s my first time back.. I’m really excited but unfortunately I am only here for 5 days.. I want to go and see my high school - HAC - is it possible? Can I walk in after school and is it ok to walk around? I have few places to visit : Beaches Arts & Crafts village Padmanabha Swamy Temple Chalai market Planetarium Every time I think of these places, I’m flooded with memories. I’m so excited to visit them again! Did I miss anything? Also is there a place I can get cheap branded stuff