Gardens are located at Ghogha Circle, Mahila College Circle, Rupani Circle, Meghani Circle, Shivaji Circle, Sardarnagar Circle, Jewels Circle and Crescent Circle. The city of Bhavnagar was one of the earliest towns to have underground drainage in Gujarat, and was among the first cities in Gujarat to have a water filtration plant. When set up by Krishna Kumarsinhji Bhavsinhji, the filtration plant was the largest in Asia. Education Bhavnagar has various schools and educational institutions. Nanabhai Bhatt, Gijubhai Badheka, Manbhai Bhatt (founder of Shishuvihar), Harbhai Trivedi, and Taraben Modak helped develop the rural and women's education. Samaldas Arts College where Mahatma Gandhi studied in 1888 is one of the oldest institutions to provide higher education. Some of the other institutions which provide higher education are Bhavnagar University, Shantilal Shah Engineering College, Government Engineering College, Bhavnagar. Schools Calorx Public School Amar Jyoti International School Fatima Convent School Shree Gyanmanjari Vidyapith Shree Naimisharanya School The K. P. E. S. School Universities and colleges Government Engineering College, Bhavnagar Government Medical College, Bhavnagar Maharaja Krishnakumarsinhji Bhavnagar University Samaldas Arts College (first college in Bhavnagar) Shantilal Shah Engineering College Smt. R.D. Gardi Bhavnagar Stree (affiliated to SNDT Women's University) Research and development Because of its salt and marine environment, Bhavnagar has a research and development centre known as - Central Salt and Marine Chemicals Research Institute (CSMCRI). Economy and industry Industrial development in Bhavnagar district could be attributed to the presence of a large number of diamond cutting and polishing units, salt and marine chemicals, plastics, shipbuilding, and ship-breaking industries. Bhavnagar is an important center for the diamond cutting and polishing industry in Gujarat as well as India. Thousands of skilled diamond-polishing workers are employed in diamond-cutting and polishing firms, whose subsidiary offices are involved in cities like Surat, Mumbai, and Antwerp. Bhavnagar stands second in the diamond cutting and polishing industry after Surat in India, with 6,000 units operating from the district and employing more than 300,000 people. Bhavnagar's commercial importance is enhanced by its proximity to the Gulf of Cambay and the Arabian Sea. Bhavnagar is the largest producer of salt, with 34,500 tons of salt being produced annually in the district. The Alang ship breaking yard is the biggest in the world, recycling about 50% of the salvaged ships of the world. This has also helped develop supporting industries, such as oxygen bottling plants, re-rolling mills, and induction furnaces. Industrial Estates Bhavnagar