Shan Man Ong, standing on a bamboo raft, explores the downstream entrance of Tham Lod cave in Pang Mapha, Thailand.

Shan Man Ong, standing on a bamboo raft, explores the downstream entrance of Tham Lod cave in Pang Mapha, Thailand.

Shan Man Ong, standing on a bamboo raft, explores the downstream entrance of Tham Lod cave in Pang Mapha, Thailand.

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