Mui Ca Mau National Park
This mangrove forest and wetland, where rivers and waterways feed through Vietnam's southernmost point into the sea, was recognized as a UNESCO World Biosphere Reserve in 2009. The 371,506 hectare park features rich biodiversity, including rare and endangered birds, animals, and reptiles. At the time of writing, no organized tours enter the park, though there has been some talk of introducing community-based ecotourism. Tours bring you to a tourism area at the mainland's southern tip (where famously you can see sunrise and sunset in the same spot), 110 km (68 miles) from Ca Mau City. There's a seaside promenade, boardwalks, and boats that take you into some of the mangroves for bird-watching, and several large, very concrete landmarks, including a copy of the Hanoi flag tower; inside is a museum and its high position affords a panoramic view of the green forest.