Legend says the afterlife for ancient Mayans was a terrifying obstacle course in which the dead had to traverse rivers of blood, chambers¹ full of sharp knives, bats and jaguars².

Now a Mexican archaeologist using long-forgotten testimony³ from the Spanish Inquisition says a series of caves he has explored may be the place where the Maya actually tried to depict⁴ this highway through hell.

The network of underground chambers, roads and temples beneath farmland and jungle on the Yucatan peninsula suggests the Maya fashioned them to mimic⁵ the journey to the underworld, or Xibalba, described in ancient mythological⁶ texts such as the Popol Vuh.

"It was the place of fear, the place of cold, the place of danger, of the abyss," said University of Yucatan archaeologist Guillermo de Anda.

Searching for the names of sacred sites mentioned by Indian heretics who were put on trial by Inquisition courts, De Anda discovered what appear to be stages of the legendary⁷ journey, recreated in a half-dozen caves south of the Yucatan state capital of Merida.

Archaeologists have long known that the Maya regarded caves as sacred and built structures in some.

But De Anda's team introduced "an extremely important ingredient" by using historical records to locate and connect a series of sacred caves, and link them with the concept of the Mayan road to the afterworld, said archaeologist Bruce Dahlin of Shepherd University, who has studied other Maya sites in the Yucatan.

There, in the stygian darkness, a scene unfolded that was eerily⁸ reminiscent of an "Indiana Jones" movie, tottering⁹ ancient temple platforms, slippery staircases and tortuous¹⁰ paths that skirted underground lakes littered with Mayan pottery¹¹ and ancient skulls¹².

The group explored walled-off sacred chambers that can only be entered by crawling along a floor populated by spiders, scorpions¹³ and toads¹⁴.

To find Xibalba, De Anda spent five years combing the 450-year-old records of the Inquisition trials the Spaniards held against Indian "heretics" in Mexico.

The Spanish were outraged¹⁵ that the Mayas continued to practice their old religion even after the conquest. So they used the trials to make them reveal the places where they performed their ceremonies.

Time after time, the defendants¹⁶ mentioned the same places, but the recorded names changed over the centuries or were forgotten.

Armed with clues from trial records, the archaeologists asked locals for caves with similar-sounding names or coordinates¹⁷ that would place them nearby.

The Mayas used the sinkhole caves, known as cenotes, as places of worship and depositories for sacrificed humans. Many cenotes still contain pools that supply villages with water. The best-known is the broad, circular pool at the ruins of Chichen Itza.

The cenotes De Anda found were more dry, better hidden and farther from villages. They seem to have had a special religious significance because even as the Maya were forced to convert to Christianity, they still traveled long distances to worship there.

Among De Anda's discoveries are a broad, perfectly¹⁸ paved, 100-meter underground road, a submerged temple, walled-off stone rooms and the "confusing crossroads" of the legends.

At the center of one of the underground lakes, De Anda found a collapsed¹⁹ and submerged altar with carvings²⁰ indicating it was dedicated²¹ to the gods of death.