The golden dome is the Memorial Hall of the sects founder, Phramonkolthepmuni.
This is surrounded by a massive circular concrete platform which functions as the Meditation Amphitheatre.
The entire complex is located on a thousand-acres piece of land.
Mass rituals and meditations are held everyday, helped by thousands of volunteers.
During Sundays and major religious festivals, nearly 100,000 worshippers congregate at the complex.
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Sources:Wikipedia,Wikitravel,Foreign Policy,Dhammakaya.net