National Geographic has published a short article about Waterfall Cave, located here in Cayo, across from Caves Branch Jungle Lodge. Definitely worth a read, and the Waterfall Cave is a must if you haven't been there yet. More great pictures here.
"Once thought to be the entrance to the mythical Xibalba, Belize's Waterfall Caves is a spectacular subterranean world with a few grizzly surprises... I’m in a cave in the Belizean jungle, hundreds of feet underground, beneath a limestone mountain ridge. We’ve been following the subterranean course of a river, but have taken an unplanned vertical diversion up a scarcely defined sidetrack that disappears into the roof of the cave. I’m refusing to let myself think about the return journey."