The Mayas believed that after you dies you found Xibalba by following a dog which could see at night. That dog lead your soul to Xibalba. The Mayas also believed that, according to Boingboing:
There were also lots and lots of human bones. According to the ancient Mayan
scripture Popol Vuh, the entrance to Xibalba was once protected by rivers filled
with blood, scorpions, and pus, and houses swarming with shrieking bats.
In other words, it was pretty much like Andy Dick's house.