ancient laterite stone stairway down of the base of the main stupa, khao klang nok, influence of draravati culture 8th-9th century

8th9th ancient archaeological architecture asia asian attraction background base brick buddhism buddhist building century culture destination down draravati famous green heritage historic historical history holy influence khao klang landmark landscape laterite main monument nature nok old pagoda period petchaboon religion ruin site sky square staircase stairway stone stupa temple thailand tourism tower travel wall wat