Sumur Gumuling

And underground mosque with underground tunnel passes through Taman Sari [Water Castle] to direction the ruins of old palace [Kraton] nearby Pasar Ngasem, Jogjakarta.  One of the intersection of the tunnel heading to Parangtritis beach. In there, the Kings of Mataram build communication with Kanjeng Ratu Kidul [also known as Nyai Roro Kidul] as their spiritual wife. And they brings her some offerings. But this section now has been closed because of safety reason. 

This underground mosque now stay as an object of photography also place for making videoclips.  Several famous Indonesian group band made their clip in this ruins.