Gyokusendo Cave, Okinawa. Second longest limestone cave in Japan.
Gyokusendo Cave is located at the southern end of Okinawa Honto. At 5km in length, it is the second longest limestone cave in Japan. 890 meters of the cave are open to visitors and it’s well worth a trip. Gyokusendo Cave is located in the theme park Okinawa World. Once you leave the cave you can see various traditional Okinawan crafts including pottery, glass blowing, weaving and pickling poisonous snakes in alcohol.
This shot was taken with the camera on a tripod and a shutter speed of around 15 seconds. The slow shutter speed means that all the tourists wandering along the walkway have magically disappeared.
TRAVEL 67 : Chris Willson Photography 
Now this I _really_ want to see.
“and pickling poisonous snakes in alcohol”
And this I really _don’t_ want to see. In fact, I don’t want to see it badly enough that I may not be able to go to the cave at all if the snakes are not optional.
magic disappearing tourists – clever!