The fireflies are located in the forests between Mexico City and Puebla, Mexico.  The closest town to the forest reserves is Nanacamilpa.  This area was once private logging land and is still privately owned.  There are about a dozen reserves you can access from Nanacamilpa. Each offer great firefly experiences.

Common question:

• Where did you film the Firefly scenes I saw in National Geographic's "Supernatural" on Disney+? That's a closely guarded secret!  It was on private land near the public firefly reserves of Nanacamilpa.     

• Will you show me the spot?  Maybe!  DM me at Blake.Congdon on Instagram :)