This is the metal guide to my cave research.
First, get Into the pit (Fight/Rob Halford).
Creep or haul yourself Down in black (Mustasch)
Do not Fear the dark (Iron Maiden)
This is because the cave is The quite place (In Flames) the Maya looked for
Never mind the Bat[s] out of hell (Meatloaf)
The cave floor is covered with bat guano and you are likely to do Dirty deeds (perhaps not dirt cheap, unless you are a looter) (AC/DC)
When it is time to return look for the Light in extension (Tiamat)