Imagine living in a city that never stays in one place. Instead of being built on land, it floats across the world's oceans, carrying tens of thousands of residents while offering schools, restaurants, hospitals and even a stadium.

With a water park, hospital, school and plenty of parks, plans for a new floating city might sound appealing for anyone looking to relocate to enjoy a more glamorous lifestyle.

Nearly 30 years after it was first proposed, Freedom Ship is again drawing global attention with plans for schools, a hospital, parks and homes at sea, though the $15 billion…