(click to enlarge)
(click to enlarge) Surprise Cave with artificial light.
"The bay consists of a dense cluster of 1,969 limestone monolithic islands, each topped with thick jungle vegetation, which rise spectacularly from the ocean. Several of the islands are hollow, with enormous caves.
Ha Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognized Ha Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated. ...The New Open World Foundation has included Halong Bay on its list for nomination as one the World's 7 Natural Wonders."