Just like those bigger riverboats, the Soon Hong No. 7 carried a spare drive shaft and propeller. I still don't know how they would have gone about changing that mid-river.
This photo was taken close by the location of yesterday's flowstone photo. One feature in this photo that I remain curious about is the small curtain-like calcite growth from the floor that separates the pools of water. My inner geologist and caver don't have answers for that one so any ideas would be appreciated.
If I were shooting this today, I'd try to get a person or something else in the shot to provide some scale. I'd also seek to use off-camera flash from the side the provide more interesting shadows that better emphasize the wonderful textures of this flowstone.
The photo below is of some flowstone in a cave in Mulu. Flowstone is formed from calcite where water flows down a wall. As the water is agitated, it outgasses it's carbon dioxide leaving behind calcium carbonate, aragonite, gypsum or other minerals that were previously dissolved in the water.
As you walk around a bend in the trail on your way of of Deer Cave, you're presented with this profile of Abraham Lincoln.
The shot below is perhaps the classic Deer Cave shot. Mine is actually a seven-shot HDR - seven slides scanned and merged in Photomatix Pro.