10 Cave Discoveries That Will Make You Believe in Magic

3. Prehistoric Mayan Wealth

Found Year: 2019 Est. Value: Incalculable Under Mexico's Chichén Itzá, in a once-sealed cave that was unearthed in 2018, archaeologists uncovered a cache of looted artifacts. Part of the Balamku network, the underground chamber holds more than 150 holy objects, such as ornamental plates with the faces of ancient gods and incense burners.

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Relic from the Ancient Maya ©Associated Press/Alamy The jewels, which are thought to have remained undiscovered for more than a millennium, offer insight into the spiritual customs of the Mayan city. When the cave was first found in 1966, villagers shut it off according to archeologist Víctor Segovia Pinto's instructions, adding to the cave's mystery and making it a conundrum that took fifty years to solve.