Join this 1-day tour, you'll get explore Ha Long Bay, a UNESCO World Heritage Site, to your heart's content. This natural wonder offers extraordinary sights and plenty of opportunities for adventures that you won't find anywhere else. You'll cross the calm waters to beautiful limestone cliffs and marvelous caves, and to have a chance to go inside Thien Cung Cave, home to stalactites and stalagmites that come in all shapes and sizes, swimmingly transferring you to a world that is out of ours. It sounds like an incredible tour, doesn't it?