I'm visiting Kanchanburi's not so popular sites, this one is not far from Sai Yok Yai waterfall. I noticed a sign on the road, took the detour and then regretted it almost immediately, well sort of.
The first hurdle is the guard, he explains that its a walk about 500m into the jungle, then you get a guide to take you into the cave. Walk? Up hill into a jungle? I must be getting lazy, even 500m sounds a long way.
Fortunately there are rest places up the hill, its not a long walk. He assures me the cave has bats to see, so that will make a change from the usual cave visit.