I am a freelance photographer and live in Jakarta. You can contact me by email at deopus@yahoo.com.
The photo is taken in Sleman, Central Java. It is located on the top of Mount Ratu Boko. Historically, " Ratu Boko" was the name of the father of Lara Jonggrang(the name of the main temple at Prambana Temple complex). Ratu Boko had been used widely by the since 8th centuries.
You still can find more information about Ratu Boko @ www.yogyes.com/id/yogyakarta-tourism-object/places-of-interest/ratu-boko/
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this is the 600th post of this blog!:)