The authorities of any city in this state which has a population of ten thousand or more, according to the last official government census, and the authorities of any municipality bordering on the Mississippi Sound or Gulf of Mexico are hereby given the authority to acquire by purchase, deed, donation, gift, grant, reclamation, lease, dedication, or otherwise, land, harbor sites or water frontage for the purpose of establishing, developing, promoting, maintaining, and operating harbors for small water crafts and recreational parks connected therewith within its territorial limits, or both, and shall have the power to acquire, purchase, install, rent, lease, mortgage, incumber, construct, own, hold, maintain, equip, use, control and operate recreational parks and harbors for small water craft.