Experts concerned about potential cable car system’s harm to Son Doong Cave The Quang Binh People’s Committee said on Thursday that they are taking into careful consideration a proposed project to build a cable car system to Son Doong Cave - the world’s current largest - in UNESCO-recognized Phong Nha- Ke Bang National Park amidst mounting concerns among the public and conservation experts regarding the potential harm the system may do to the site.

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