3. Marina Beach, Chennai, India.
Though trash has amassed all over this beach and its waters, it remains a popular weekend destination for locals — and fisherman do their jobs, too.
Also Check Out: 6 Craziest World Records (Slideshow)
4. Northern Territory and Queensland, Australia.
Shark attacks are the most famous beach predators, but on many Australian beaches, the worst perpetrators are jellyfish and their relatives, bluebottles (pictured). These toxic critters virtually take over beaches in Northern Australia, leading to thousands of stings, some fatal.