海水从古老的珊瑚礁上倾泻而下，杭莱，越南 Seawater cascades over an ancient coral reef, Hang Rai, Vietnam (© Thang Tat Nguyen/Getty Images)

海水从古老的珊瑚礁上倾泻而下，杭莱，越南 Seawater cascades over an ancient coral reef, Hang Rai, Vietnam (© Thang Tat Nguyen/Getty Images)

潮汐探戈 A tidal tango

永希湾，越南

欢迎来到杭莱，这里既有古老的岩层，又有生机勃勃的珊瑚礁！这个洞穴也被称为獭洞，被努伊蔡国家公园包围着，是越南中南部海岸地区永希湾的一部分。该地区的天然珊瑚礁被岩层环绕，这些岩层堆叠在一起，形成了一组洞穴。“杭莱”或“獭洞”名称的由来之一，是人们偶尔会看到水獭在洞穴中栖息。另一种解释是由于该地区盛产莱树，这种树的油可以用于船只防水。无论是水下还是水上，这里都有令人惊叹的景观：深潜者可以观赏五颜六色的珊瑚，喜欢在海风中露营的游客可以欣赏美丽的日落。

Vinh Hy Bay, Vietnam

Welcome to Hang Rai, a blend of ancient rock formations and vibrant coral reefs. Also called Rai Cave, this cavern is part of the Vinh Hy Bay—enclosed by Nui Chua National Park—in the South Central Coast region of Vietnam. The area's natural coral reefs are surrounded by rock formations that are stacked upon each other to form a group of caves. One origin of the name 'Hang Rai' or 'Rai Cave' comes from otters (rai) that were occasionally seen seeking shelter in the caves. Another explanation is attributed to the abundance of rai trees in the area, whose oil was used to waterproof boats. The landscape is an awe-inspiring sight both under and above water: corals for deep divers and colorful sunsets for those who like camping in the sea breeze.