My left leg was jackhammering with fatigue, calf muscle spasming uncontrollably as I struggled to maintain a perch on the tiny nub of rock. I had to make my move now. It was a leap of faith when I pushed off and jumped up and clung to a knob of rock four feet above me, then scurried ungracefully up onto safe ground. I was panting and my clothes were soaked with sweat and covered with a rime of sticky clay. My head pounded from dehydration. But as I waited for our guide to follow me up onto the ledge, I caught a faint glow. Could it be? Daylight. At last.

We’d been underground for five hours, as deep as 600 feet below the surface of the jungle in a cave the Belizeans call the Mountain Cow Cave. The cavern has been rebranded for tourists as the more picturesque-sounding Crystal Cave, though few tourists make it here. Unlike the more famous and accessible Actun Tunichil Muchnal cave, which sees thousands of visitors per year, Crystal Cave only sees a few hundred, most only peeking into its impressive foyer. I could see why. It was not for the faint of heart.
Our day started early, with a pickup at our hotel by two guides, Gils and his cousin, who wore rubber gardening boots and constant smiles but said little. After a bumpy ride past small villages and into increasingly remote forest, we reached a small parking lot that served as the entrance to St. Herman’s Blue Hole National Park. To get to the cave we had to hike through the jungle on a muddy trail that would have mired even the stoutest Land Rover. I could see why the British sent their elite troops to Belize for jungle training. The going was treacherous and every step risked a twisted ankle or worse. Gils warned us to look before we grabbed tree trunks for support: many bore evil-looking spikes and others might be the perch for a fer-de-lance, one of the world’s most poisonous snakes. The jungle was trying to kill us.
Belize — the entire Yucatan peninsula, actually — is riddled with caves like a massive block of Swiss cheese.
After a 30-minute hike and thigh-busting slippery ascent, we finally reached the cave opening. Though we were in a national park and this was arguably its main attraction, we didn’t see another person and there was no marker or interpretive signage anywhere. The trail just died out at a huge hole in the ground. Vines and roots dripped over its side, hanging well into the maw; I wouldn’t have been surprised to see a flock of bats, or even pterodactyls, fly out. Gils set down his pack, took out a well-worn hemp rope, knotted it around a nearby tree trunk and threw the free end over the edge of the abyss. He told us to put on our helmets. Wasn’t there a waiver we needed to sign? I nervously buckled my brain bucket and checked that the headlamp was working.
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