front view of khuha kharuehat throne on mound in hollow place

ancient antique architecture art asia attraction building cave cavern caving chamber cliff culture environment exploration front hall heritage hollow khan khao kharuehat khiri khuha limestone mound mountain mountaintop nakhon national natural nature old park pavilion phraya place prachuap rock roi sam southeast speleology stone structure thai thailand tham throne tourism tourist traditional tree underground view weathering yot