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The worlds greatest wonders dont reveal themselves easily you discover them. Thats what it feels like as you step inside the Phraya Nakhon cave of Khao Sam Roi Yot National Park one of a number of caverns carved into the limestone cliffs that glower over the Gulf of Thailand 250km south of Bangkok. The route in is via rough stone steps leading through pine forest rattling with dusky langurs and goat-like serow. As you enter the central chamber light pours in from where the ceiling collapsed…
