One of the top tourist attractions in Southeast Asia is Ha Long bay. It’s a UNESCO world heritage site, famous for its enormous limestone cliffs and beautiful blue water. The fame, however, has a down side: this Vietnamese bay is filled with cruises, backpacker party boats, and even worse, tons of plastic. So on the one hand, we really wanted to see this paradise and on the other, we hated the thought of sailing in, and adding to, the plastic soup.