(I´m here again. Seems that three of you want to explore the interior, so there´s where you go. About the water, you didn´t help but notice that the ship´s cleric is fond of using Create Water -but not Create food and water-)
The border where the jungle meets the beach makes the woods look unassailable; a tangled mass of bushes and young trees agonize between lack of sunlight and the poor soil and salt water. Beyond that wall, the trees submerges you in the dark deepness of almost perpetual darkness -only here and there a fallen tree opens the canopy enough to allow an adventuring ray of sunligt to fall- A carped of rotten leaves creak under your feet, until you realize that the bugs that crawl under them are the ones that snap when you step on them. Little lizards and snakes look at you, angry for having disturbed their unchanging lives and quickly dissapear; sound of life echo around the living columns, their sources hidden from your sight and only show when you look sideways. Minutes after you enter the jungle, it starts to weight heavily -it´s too humid, and sweating doesn´t cool you.
The light becomes less green and more dark; it´ll be night soon. Just when you´re thinking on making camp or not, you make a discovery: what´s left of a road -just some stone labs, riding over roots and cracked by the jealous trees- and, more disturbing, three large* skulls on long sticks. The skulls have only one eye socket, on the centre of the forehead.** No other bones or skeletons are around.
*By large I mean Large.
**You´d expect the sticks were used to, er, stick the head on them and let the bugs do their work until only the skull remains. In that case, the stick should have the signs of some work, though they actually look too crude.