Peleliu was the site of some horrific fighting. When people are entrenched in caves (which there are hundreds of caves in Peleliu) one of the best ways to fight them is with the use of a flame thrower. This must of been a horrible way to die being burned to death while the fire is consuming all the air in the cave. In many of the caves, the burn marks are still clearly visible in the entrances. In one cave close to the main road that we went into, there were still Japanese bones lying on the ground. If you have a hard time dealing with human remains, you may want to prepare yourself. When Palau became independant, they put a stop to all the excavations (you still can but there is a lot of red tape to go through) on Peleliu so the dead now rest where they died.
Since Peleliu was the site of one of the bloodiest battles of the Pacific and lasting for such a long time, there is bound to be old, unused ammunition and stuff that did not go off. Adding to that that when Palau became an independant nation they stopped all digging with regards to WW2. Walking inside of the more visited caves you can see unused ammunitions just laying around. Don't touch the stuff. Some of the stuff may not have it's warheads, fuzes or the pin still might be in it, don't touch it. This stuff is over 60 years old and should not be handled. If you are not sure of stuff, don't touch it either. I saw some stuff that I didn't think about until I was told that they are improvised Japanese landmines.