The brooklyn navy yard was once home to the worlds busiest shipyard during worldwar ii visitors can travel by bus and explore the grounds on this 2 hour historical tourwith the help of an expert guide guests get an up close look at the contemporaryindustrial park with essential stops at some of the yards key sites like the naval filmexchange dry dock 1 and the famed naval hospital listen in on recordings from ahandful of the 70 000 workers who toiled on repairs of battleships and a