- Christmas Island Speleology Eventually there will be some cave maps and descriptions of this area. Before then please enjoy some of the images taken on the 1987 expedition to the Island. The first picture is of Vanda Longman in the streamway of Daniel Roux Cave. Click on the picture to receive the JPEG version. This second picture is of a helictite in Lost Lake Cave. Click on the picture to ...wasg.iinet.net.au/ci.html