Slide 22 of 64: Often dubbed a “floating forest”, the shipwreck of SS Ayrfield in Sydney’s Homebush Bay is so overgrown with mangrove trees that only its bow is visible. The area was once a busy port and trading boats would frequently pass through the waters here, carrying war supplies and other freight. But when trading slowed after the Second World War, many ships were decommissioned and simply left in the bay.