Cave of death in costa rica
that's a very small cave. at recreo verde in costa rica, One of the more notable features of the cave is the pool of carbon dioxide on the floor, which is remarkably stable, and nearly 100% CO2.
It is just deep enough that any small animals that go in there, end up in that oxygen-free zone and quickly pass out and die. The Recreo Verde folks told us that the most common animals that die in the cave are rats, snakes and small birds.
The Cave of Death is not much of a cave, so to speak, but it is a really fascinating hole in the ground nonetheless. Extending only about 10 feet into the hillside, it ends at a crack too small to continue. That is, if it were reasonable to continue for other reasons.
Located on the flank of the Poas Volcano in Costa Rica, the Cave of Death just happens to be near some very nice hot springs which have been developed into Recreo Verde. This fine place was our base camp, actually a fabulous cabin, for our work in this area.
And as for the cave, it is a bit of a tourist attraction, and probably one of the few commercial caves where one does not in fact go in the cave. Why? Good question and glad you asked. The reason for the name is fairly simple, as the cave itself is a huge emitter of nearly pure carbon dioxide. This, as one might suspect, is what could mildly be called, "bad air" and it is quite dangerous and often fatal to animals that enter the cave.
But, since carbon dioxide is heavier than air, the "bad air" is mostly along the floor, and in fact pools up at the entrance with the spillover rolling out of the cave and along the ground. How do we know this? Another good question! Guy van Rentergem invented a clever little smoker device out of an e-cigarette machine, which could be placed in specific spots to see exactly where the gases were going. As well, we used a carbon dioxide meter to determine where the gas was and in what concentrations
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