Aranui Limestone Cave at Waitomo Caves, Waikato, North Island, New Zealand.
Technical Information:
I photographed this photo with the digital SLR camera model Canon EOS-1Ds Mark II, aperture of f/5.0, exposure time of 5/2 sec. on ISO 100, as always I used a original Canon Lens, the focus lenght for this picture was 59mm.