Image by Westend61 The American Everglades is a subtropical wetland ecosystem and the only known place in the world where alligators and crocodiles co-exist 🐊 In this swampy region of Florida, Joshua Gates (@gatesygram) is exploring a murky history of Prohibition Era secrets - and treasure that may lie deep in the mangroves. #ExpeditionUnknown is new tonight at 8p ET on Discovery and streaming on @discoveryplus .