If you walk past the Kessowjee Naik Fountain and Clock Tower at Masjid Bunder, it's hard to tell that this heritage structure was built more than 140 years ago by a Gujrati merchant and his son, as a service to the city. "There are many such pyaavs [water fountains] in the city that give you an insight into the building material and technology of those days and also help you understand the social fabric of the times, through the minds of the philanthropist who donated these for a noble cause," says architect and heritage enthusiast Rahul Chemburkar of Vaastu Vidhaan.